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name="title" value="Special:Sök"> </div> <button class="cdx-button cdx-search-input__end-button">Sök</button> </form> </div> </div> </div> <nav class="vector-user-links vector-user-links-wide" aria-label="Personliga verktyg"> <div class="vector-user-links-main"> <div id="p-vector-user-menu-preferences" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-userpage" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <nav class="vector-appearance-landmark" aria-label="Utseende"> <div id="vector-appearance-dropdown" class="vector-dropdown " title="Ändra utseendet på sidans teckenstorlek, bredd och färg" > <input type="checkbox" id="vector-appearance-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-appearance-dropdown" class="vector-dropdown-checkbox " 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user-links-collapsible-item"><a data-mw="interface" href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_sv.wikipedia.org&uselang=sv" class=""><span>Stöd Wikipedia</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Special:Skapa_konto&returnto=Dom%C3%A4nnamnssystemet" title="Du uppmuntras att skapa ett konto och logga in, men det är inte obligatoriskt" class=""><span>Skapa konto</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Special:Inloggning&returnto=Dom%C3%A4nnamnssystemet" title="Inloggning ger tillgång till fler funktioner för den som vill skriva och redigera artiklar. [o]" accesskey="o" class=""><span>Logga in</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" title="Fler alternativ" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Personliga verktyg" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-ellipsis mw-ui-icon-wikimedia-ellipsis"></span> <span class="vector-dropdown-label-text">Personliga verktyg</span> </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal user-links-collapsible-item" title="Användarmeny" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_sv.wikipedia.org&uselang=sv"><span>Stöd Wikipedia</span></a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Special:Skapa_konto&returnto=Dom%C3%A4nnamnssystemet" title="Du uppmuntras att skapa ett konto och logga in, men det är inte obligatoriskt"><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>Skapa konto</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Special:Inloggning&returnto=Dom%C3%A4nnamnssystemet" title="Inloggning ger tillgång till fler funktioner för den som vill skriva och redigera artiklar. [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Logga in</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Sidor för utloggade redigerare <a href="/wiki/Hj%C3%A4lp:Introduktion" aria-label="Läs mer om redigering"><span>läs mer</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Special:Mina_bidrag" title="En lista över redigeringar från denna IP-adress [y]" accesskey="y"><span>Bidrag</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Special:Min_diskussion" title="Diskussion om redigeringar från det här IP-numret [n]" accesskey="n"><span>Diskussion</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Webbplats"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Innehåll" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Innehåll</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">flytta till sidofältet</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">dölj</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Inledning</div> </a> </li> <li id="toc-Funktion" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Funktion"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Funktion</span> </div> </a> <ul id="toc-Funktion-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Rotserver" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Rotserver"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Rotserver</span> </div> </a> <ul id="toc-Rotserver-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Dynamisk_DNS" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Dynamisk_DNS"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Dynamisk DNS</span> </div> </a> <ul id="toc-Dynamisk_DNS-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Vanliga_posttyper_i_DNS" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Vanliga_posttyper_i_DNS"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Vanliga posttyper i DNS</span> </div> </a> <ul id="toc-Vanliga_posttyper_i_DNS-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-DNSSEC" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#DNSSEC"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>DNSSEC</span> </div> </a> <ul id="toc-DNSSEC-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Specifikation" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Specifikation"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Specifikation</span> </div> </a> <ul id="toc-Specifikation-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Källor" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Källor"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Källor</span> </div> </a> <ul id="toc-Källor-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Externa_länkar" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Externa_länkar"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>Externa länkar</span> </div> </a> <ul id="toc-Externa_länkar-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Innehåll" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Växla innehållsförteckningen" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Växla innehållsförteckningen</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Domännamnssystemet</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Gå till en artikel på ett annat språk. Tillgänglig på 80 språk" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-80" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">80 språk</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Domeinnaamstelsel" title="Domeinnaamstelsel – afrikaans" lang="af" hreflang="af" data-title="Domeinnaamstelsel" data-language-autonym="Afrikaans" data-language-local-name="afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D9%86%D8%B8%D8%A7%D9%85_%D8%A3%D8%B3%D9%85%D8%A7%D8%A1_%D8%A7%D9%84%D9%86%D8%B7%D8%A7%D9%82%D8%A7%D8%AA" title="نظام أسماء النطاقات – arabiska" lang="ar" hreflang="ar" data-title="نظام أسماء النطاقات" data-language-autonym="العربية" data-language-local-name="arabiska" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Sistema_de_nomes_de_dominiu" title="Sistema de nomes de dominiu – asturiska" lang="ast" hreflang="ast" data-title="Sistema de nomes de dominiu" data-language-autonym="Asturianu" data-language-local-name="asturiska" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Domain_Name_System" title="Domain Name System – azerbajdzjanska" lang="az" hreflang="az" data-title="Domain Name System" data-language-autonym="Azərbaycanca" data-language-local-name="azerbajdzjanska" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%A1%E0%A7%8B%E0%A6%AE%E0%A7%87%E0%A6%87%E0%A6%A8_%E0%A6%A8%E0%A7%87%E0%A6%AE_%E0%A6%B8%E0%A6%BF%E0%A6%B8%E0%A7%8D%E0%A6%9F%E0%A7%87%E0%A6%AE" title="ডোমেইন নেম সিস্টেম – bengali" lang="bn" hreflang="bn" data-title="ডোমেইন নেম সিস্টেম" data-language-autonym="বাংলা" data-language-local-name="bengali" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/Domain_Name_System" title="Domain Name System – min nan" lang="nan" hreflang="nan" data-title="Domain Name System" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="min nan" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/DNS" title="DNS – belarusiska" lang="be" hreflang="be" data-title="DNS" data-language-autonym="Беларуская" data-language-local-name="belarusiska" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/DNS" title="DNS – belarusiska (tarasjkevitsa)" lang="be-tarask" hreflang="be-tarask" data-title="DNS" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="belarusiska (tarasjkevitsa)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/Domain_Name_System" title="Domain Name System – bulgariska" lang="bg" hreflang="bg" data-title="Domain Name System" data-language-autonym="Български" data-language-local-name="bulgariska" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bar mw-list-item"><a href="https://bar.wikipedia.org/wiki/Domain_Name_System" title="Domain Name System – bayerska" lang="bar" hreflang="bar" data-title="Domain Name System" data-language-autonym="Boarisch" data-language-local-name="bayerska" class="interlanguage-link-target"><span>Boarisch</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Domain_Name_System" title="Domain Name System – bosniska" lang="bs" hreflang="bs" data-title="Domain Name System" data-language-autonym="Bosanski" data-language-local-name="bosniska" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Domain_Name_System" title="Domain Name System – katalanska" lang="ca" hreflang="ca" data-title="Domain Name System" data-language-autonym="Català" data-language-local-name="katalanska" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Domain_Name_System" title="Domain Name System – tjeckiska" lang="cs" hreflang="cs" data-title="Domain Name System" data-language-autonym="Čeština" data-language-local-name="tjeckiska" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Domain_Name_System" title="Domain Name System – danska" lang="da" hreflang="da" data-title="Domain Name System" data-language-autonym="Dansk" data-language-local-name="danska" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-ary mw-list-item"><a href="https://ary.wikipedia.org/wiki/%D8%B3%D9%8A%D8%B3%D8%B7%D9%8A%D9%85_%D8%AA%D8%A7%D8%B9_%D8%B3%D9%85%D9%8A%D8%A7%D8%AA_%D8%A7%D9%84%D8%B6%D9%88%D9%85%D9%8A%D9%86%D8%A7%D8%AA" title="سيسطيم تاع سميات الضومينات – marockansk arabiska" lang="ary" hreflang="ary" data-title="سيسطيم تاع سميات الضومينات" data-language-autonym="الدارجة" data-language-local-name="marockansk arabiska" class="interlanguage-link-target"><span>الدارجة</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Domain_Name_System" title="Domain Name System – tyska" lang="de" hreflang="de" data-title="Domain Name System" data-language-autonym="Deutsch" data-language-local-name="tyska" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Domeeninimede_s%C3%BCsteem" title="Domeeninimede süsteem – estniska" lang="et" hreflang="et" data-title="Domeeninimede süsteem" data-language-autonym="Eesti" data-language-local-name="estniska" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%A3%CF%8D%CF%83%CF%84%CE%B7%CE%BC%CE%B1_%CE%9F%CE%BD%CE%BF%CE%BC%CE%B1%CF%84%CE%BF%CE%B4%CE%BF%CF%83%CE%AF%CE%B1%CF%82_%CE%94%CE%B9%CE%B1%CE%B4%CE%B9%CE%BA%CF%84%CF%8D%CE%BF%CF%85" title="Σύστημα Ονοματοδοσίας Διαδικτύου – grekiska" lang="el" hreflang="el" data-title="Σύστημα Ονοματοδοσίας Διαδικτύου" data-language-autonym="Ελληνικά" data-language-local-name="grekiska" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-eml mw-list-item"><a href="https://eml.wikipedia.org/wiki/Dom%C3%ACni_(inform%C3%A0tica)" title="Domìni (informàtica) – Emiliano-Romagnolo" lang="egl" hreflang="egl" data-title="Domìni (informàtica)" data-language-autonym="Emiliàn e rumagnòl" data-language-local-name="Emiliano-Romagnolo" class="interlanguage-link-target"><span>Emiliàn e rumagnòl</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Domain_Name_System" title="Domain Name System – engelska" lang="en" hreflang="en" data-title="Domain Name System" data-language-autonym="English" data-language-local-name="engelska" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Sistema_de_nombres_de_dominio" title="Sistema de nombres de dominio – spanska" lang="es" hreflang="es" data-title="Sistema de nombres de dominio" data-language-autonym="Español" data-language-local-name="spanska" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Domajna_nomsistemo" title="Domajna nomsistemo – esperanto" lang="eo" hreflang="eo" data-title="Domajna nomsistemo" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Domain_Name_System" title="Domain Name System – baskiska" lang="eu" hreflang="eu" data-title="Domain Name System" data-language-autonym="Euskara" data-language-local-name="baskiska" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%B3%D8%A7%D9%85%D8%A7%D9%86%D9%87_%D9%86%D8%A7%D9%85_%D8%AF%D8%A7%D9%85%D9%86%D9%87" title="سامانه نام دامنه – persiska" lang="fa" hreflang="fa" data-title="سامانه نام دامنه" data-language-autonym="فارسی" data-language-local-name="persiska" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Domain_Name_System" title="Domain Name System – franska" lang="fr" hreflang="fr" data-title="Domain Name System" data-language-autonym="Français" data-language-local-name="franska" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Domain_Name_System" title="Domain Name System – galiciska" lang="gl" hreflang="gl" data-title="Domain Name System" data-language-autonym="Galego" data-language-local-name="galiciska" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-gu mw-list-item"><a href="https://gu.wikipedia.org/wiki/%E0%AA%A1%E0%AB%8B%E0%AA%AE%E0%AB%87%E0%AA%A8_%E0%AA%A8%E0%AA%BE%E0%AA%AE_%E0%AA%AA%E0%AB%8D%E0%AA%B0%E0%AA%A3%E0%AA%BE%E0%AA%B2%E0%AB%80" title="ડોમેન નામ પ્રણાલી – gujarati" lang="gu" hreflang="gu" data-title="ડોમેન નામ પ્રણાલી" data-language-autonym="ગુજરાતી" data-language-local-name="gujarati" class="interlanguage-link-target"><span>ગુજરાતી</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EB%8F%84%EB%A9%94%EC%9D%B8_%EB%84%A4%EC%9E%84_%EC%8B%9C%EC%8A%A4%ED%85%9C" title="도메인 네임 시스템 – koreanska" lang="ko" hreflang="ko" data-title="도메인 네임 시스템" data-language-autonym="한국어" data-language-local-name="koreanska" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/DNS" title="DNS – armeniska" lang="hy" hreflang="hy" data-title="DNS" data-language-autonym="Հայերեն" data-language-local-name="armeniska" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%A1%E0%A5%8B%E0%A4%AE%E0%A5%87%E0%A4%A8_%E0%A4%A8%E0%A4%BE%E0%A4%AE_%E0%A4%AA%E0%A5%8D%E0%A4%B0%E0%A4%A3%E0%A4%BE%E0%A4%B2%E0%A5%80" title="डोमेन नाम प्रणाली – hindi" lang="hi" hreflang="hi" data-title="डोमेन नाम प्रणाली" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Sustav_domenskih_imena" title="Sustav domenskih imena – kroatiska" lang="hr" hreflang="hr" data-title="Sustav domenskih imena" data-language-autonym="Hrvatski" data-language-local-name="kroatiska" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-io mw-list-item"><a href="https://io.wikipedia.org/wiki/Sistemo_di_domeno-nomi" title="Sistemo di domeno-nomi – ido" lang="io" hreflang="io" data-title="Sistemo di domeno-nomi" data-language-autonym="Ido" data-language-local-name="ido" class="interlanguage-link-target"><span>Ido</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Sistem_Penamaan_Domain" title="Sistem Penamaan Domain – indonesiska" lang="id" hreflang="id" data-title="Sistem Penamaan Domain" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesiska" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikipedia.org/wiki/Nafna%C3%BEj%C3%B3nn" title="Nafnaþjónn – isländska" lang="is" hreflang="is" data-title="Nafnaþjónn" data-language-autonym="Íslenska" data-language-local-name="isländska" class="interlanguage-link-target"><span>Íslenska</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Domain_Name_System" title="Domain Name System – italienska" lang="it" hreflang="it" data-title="Domain Name System" data-language-autonym="Italiano" data-language-local-name="italienska" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/Domain_Name_System" title="Domain Name System – hebreiska" lang="he" hreflang="he" data-title="Domain Name System" data-language-autonym="עברית" data-language-local-name="hebreiska" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%94%D0%BE%D0%BC%D0%B5%D0%BD%D0%B4%D1%96%D0%BA_%D0%B0%D1%82%D0%B0%D1%83_%D0%B6%D2%AF%D0%B9%D0%B5%D1%81%D1%96" title="Домендік атау жүйесі – kazakiska" lang="kk" hreflang="kk" data-title="Домендік атау жүйесі" data-language-autonym="Қазақша" data-language-local-name="kazakiska" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-ky mw-list-item"><a href="https://ky.wikipedia.org/wiki/%D0%94%D0%BE%D0%BC%D0%B5%D0%BD_%D0%B0%D1%82%D0%B0%D0%BB%D1%8B%D1%88%D1%82%D0%B0%D1%80_%D1%81%D0%B8%D1%81%D1%82%D0%B5%D0%BC%D0%B0%D1%81%D1%8B" title="Домен аталыштар системасы – kirgiziska" lang="ky" hreflang="ky" data-title="Домен аталыштар системасы" data-language-autonym="Кыргызча" data-language-local-name="kirgiziska" class="interlanguage-link-target"><span>Кыргызча</span></a></li><li class="interlanguage-link interwiki-ltg mw-list-item"><a href="https://ltg.wikipedia.org/wiki/Mui%C5%BEvuordu_sistema" title="Muižvuordu sistema – lettgalliska" lang="ltg" hreflang="ltg" data-title="Muižvuordu sistema" data-language-autonym="Latgaļu" data-language-local-name="lettgalliska" class="interlanguage-link-target"><span>Latgaļu</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/DNS_(protokols)" title="DNS (protokols) – lettiska" lang="lv" hreflang="lv" data-title="DNS (protokols)" data-language-autonym="Latviešu" data-language-local-name="lettiska" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/DNS" title="DNS – litauiska" lang="lt" hreflang="lt" data-title="DNS" data-language-autonym="Lietuvių" data-language-local-name="litauiska" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-li mw-list-item"><a href="https://li.wikipedia.org/wiki/Domain_Name_System" title="Domain Name System – limburgiska" lang="li" hreflang="li" data-title="Domain Name System" data-language-autonym="Limburgs" data-language-local-name="limburgiska" class="interlanguage-link-target"><span>Limburgs</span></a></li><li class="interlanguage-link interwiki-lmo mw-list-item"><a href="https://lmo.wikipedia.org/wiki/Domain_Name_System" title="Domain Name System – lombardiska" lang="lmo" hreflang="lmo" data-title="Domain Name System" data-language-autonym="Lombard" data-language-local-name="lombardiska" class="interlanguage-link-target"><span>Lombard</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Domain_Name_System" title="Domain Name System – ungerska" lang="hu" hreflang="hu" data-title="Domain Name System" data-language-autonym="Magyar" data-language-local-name="ungerska" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%94%D0%BE%D0%BC%D0%B5%D0%BD%D1%81%D0%BA%D0%B8_%D0%B8%D0%BC%D0%B5%D0%BD%D1%81%D0%BA%D0%B8_%D1%81%D0%B8%D1%81%D1%82%D0%B5%D0%BC" title="Доменски именски систем – makedonska" lang="mk" hreflang="mk" data-title="Доменски именски систем" data-language-autonym="Македонски" data-language-local-name="makedonska" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%A1%E0%B5%8A%E0%B4%AE%E0%B5%86%E0%B4%AF%E0%B4%BF%E0%B5%BB_%E0%B4%A8%E0%B5%86%E0%B4%AF%E0%B4%BF%E0%B4%82_%E0%B4%B8%E0%B4%BF%E0%B4%B8%E0%B5%8D%E0%B4%B1%E0%B5%8D%E0%B4%B1%E0%B4%82" title="ഡൊമെയിൻ നെയിം സിസ്റ്റം – malayalam" lang="ml" hreflang="ml" data-title="ഡൊമെയിൻ നെയിം സിസ്റ്റം" data-language-autonym="മലയാളം" data-language-local-name="malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Sistem_Nama_Domain" title="Sistem Nama Domain – malajiska" lang="ms" hreflang="ms" data-title="Sistem Nama Domain" data-language-autonym="Bahasa Melayu" data-language-local-name="malajiska" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-mn mw-list-item"><a href="https://mn.wikipedia.org/wiki/%D0%94%D0%BE%D0%BC%D1%8D%D0%B9%D0%BD_%D0%BD%D1%8D%D1%80%D0%B8%D0%B9%D0%BD_%D1%81%D0%B8%D1%81%D1%82%D0%B5%D0%BC" title="Домэйн нэрийн систем – mongoliska" lang="mn" hreflang="mn" data-title="Домэйн нэрийн систем" data-language-autonym="Монгол" data-language-local-name="mongoliska" class="interlanguage-link-target"><span>Монгол</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Domain_Name_System" title="Domain Name System – nederländska" lang="nl" hreflang="nl" data-title="Domain Name System" data-language-autonym="Nederlands" data-language-local-name="nederländska" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/Domain_Name_System" title="Domain Name System – japanska" lang="ja" hreflang="ja" data-title="Domain Name System" data-language-autonym="日本語" data-language-local-name="japanska" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Domain_Name_System" title="Domain Name System – norskt bokmål" lang="nb" hreflang="nb" data-title="Domain Name System" data-language-autonym="Norsk bokmål" data-language-local-name="norskt bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/DNS" title="DNS – nynorska" lang="nn" hreflang="nn" data-title="DNS" data-language-autonym="Norsk nynorsk" data-language-local-name="nynorska" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/Sist%C3%A8ma_de_noms_de_domeni" title="Sistèma de noms de domeni – occitanska" lang="oc" hreflang="oc" data-title="Sistèma de noms de domeni" data-language-autonym="Occitan" data-language-local-name="occitanska" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-mhr mw-list-item"><a href="https://mhr.wikipedia.org/wiki/DNS" title="DNS – Eastern Mari" lang="mhr" hreflang="mhr" data-title="DNS" data-language-autonym="Олык марий" data-language-local-name="Eastern Mari" class="interlanguage-link-target"><span>Олык марий</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Domain_Name_System" title="Domain Name System – polska" lang="pl" hreflang="pl" data-title="Domain Name System" data-language-autonym="Polski" data-language-local-name="polska" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Sistema_de_Nomes_de_Dom%C3%ADnio" title="Sistema de Nomes de Domínio – portugisiska" lang="pt" hreflang="pt" data-title="Sistema de Nomes de Domínio" data-language-autonym="Português" data-language-local-name="portugisiska" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Domain_Name_System" title="Domain Name System – rumänska" lang="ro" hreflang="ro" data-title="Domain Name System" data-language-autonym="Română" data-language-local-name="rumänska" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/DNS" title="DNS – ryska" lang="ru" hreflang="ru" data-title="DNS" data-language-autonym="Русский" data-language-local-name="ryska" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sah mw-list-item"><a href="https://sah.wikipedia.org/wiki/DNS" title="DNS – jakutiska" lang="sah" hreflang="sah" data-title="DNS" data-language-autonym="Саха тыла" data-language-local-name="jakutiska" class="interlanguage-link-target"><span>Саха тыла</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Sistemi_i_Emrave_t%C3%AB_Domen%C3%ABve" title="Sistemi i Emrave të Domenëve – albanska" lang="sq" hreflang="sq" data-title="Sistemi i Emrave të Domenëve" data-language-autonym="Shqip" data-language-local-name="albanska" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Domain_Name_System" title="Domain Name System – Simple English" lang="en-simple" hreflang="en-simple" data-title="Domain Name System" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Syst%C3%A9m_n%C3%A1zvov_dom%C3%A9n" title="Systém názvov domén – slovakiska" lang="sk" hreflang="sk" data-title="Systém názvov domén" data-language-autonym="Slovenčina" data-language-local-name="slovakiska" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/DNS" title="DNS – slovenska" lang="sl" hreflang="sl" data-title="DNS" data-language-autonym="Slovenščina" data-language-local-name="slovenska" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D8%B3%DB%8C%D8%B3%D8%AA%D9%85%DB%8C_%D9%86%D8%A7%D9%88%DB%8C_%D9%BE%D8%A7%D9%88%D8%A7%D9%86" title="سیستمی ناوی پاوان – centralkurdiska" lang="ckb" hreflang="ckb" data-title="سیستمی ناوی پاوان" data-language-autonym="کوردی" data-language-local-name="centralkurdiska" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%A1%D0%B8%D1%81%D1%82%D0%B5%D0%BC_%D0%B8%D0%BC%D0%B5%D0%BD%D0%B0_%D0%B4%D0%BE%D0%BC%D0%B5%D0%BD%D0%B0" title="Систем имена домена – serbiska" lang="sr" hreflang="sr" data-title="Систем имена домена" data-language-autonym="Српски / srpski" data-language-local-name="serbiska" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/DNS" title="DNS – serbokroatiska" lang="sh" hreflang="sh" data-title="DNS" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbokroatiska" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/DNS" title="DNS – finska" lang="fi" hreflang="fi" data-title="DNS" data-language-autonym="Suomi" data-language-local-name="finska" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%95%E0%AE%B3%E0%AE%AA%E0%AF%8D_%E0%AE%AA%E0%AF%86%E0%AE%AF%E0%AE%B0%E0%AF%8D_%E0%AE%AE%E0%AF%81%E0%AE%B1%E0%AF%88%E0%AE%AE%E0%AF%88" title="களப் பெயர் முறைமை – tamil" lang="ta" hreflang="ta" data-title="களப் பெயர் முறைமை" data-language-autonym="தமிழ்" data-language-local-name="tamil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-te mw-list-item"><a href="https://te.wikipedia.org/wiki/%E0%B0%A1%E0%B1%8A%E0%B0%AE%E0%B1%88%E0%B0%A8%E0%B1%8D_%E0%B0%A8%E0%B1%87%E0%B0%AE%E0%B1%8D_%E0%B0%B8%E0%B0%BF%E0%B0%B8%E0%B1%8D%E0%B0%9F%E0%B0%AE%E0%B1%8D" title="డొమైన్ నేమ్ సిస్టమ్ – telugu" lang="te" hreflang="te" data-title="డొమైన్ నేమ్ సిస్టమ్" data-language-autonym="తెలుగు" data-language-local-name="telugu" class="interlanguage-link-target"><span>తెలుగు</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%94%E0%B8%B5%E0%B9%80%E0%B8%AD%E0%B9%87%E0%B8%99%E0%B9%80%E0%B8%AD%E0%B8%AA" title="ดีเอ็นเอส – thailändska" lang="th" hreflang="th" data-title="ดีเอ็นเอส" data-language-autonym="ไทย" data-language-local-name="thailändska" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/DNS" title="DNS – turkiska" lang="tr" hreflang="tr" data-title="DNS" data-language-autonym="Türkçe" data-language-local-name="turkiska" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%A1%D0%B8%D1%81%D1%82%D0%B5%D0%BC%D0%B0_%D0%B4%D0%BE%D0%BC%D0%B5%D0%BD%D0%BD%D0%B8%D1%85_%D1%96%D0%BC%D0%B5%D0%BD" title="Система доменних імен – ukrainska" lang="uk" hreflang="uk" data-title="Система доменних імен" data-language-autonym="Українська" data-language-local-name="ukrainska" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/%D9%86%D8%B8%D8%A7%D9%85_%DA%88%D9%88%D9%85%DB%8C%D9%86_%D9%86%DB%8C%D9%85" title="نظام ڈومین نیم – urdu" lang="ur" hreflang="ur" data-title="نظام ڈومین نیم" data-language-autonym="اردو" data-language-local-name="urdu" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-vec mw-list-item"><a href="https://vec.wikipedia.org/wiki/Sistema_de_nome_de_dominio" title="Sistema de nome de dominio – venetianska" lang="vec" hreflang="vec" data-title="Sistema de nome de dominio" data-language-autonym="Vèneto" data-language-local-name="venetianska" class="interlanguage-link-target"><span>Vèneto</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/H%E1%BB%87_th%E1%BB%91ng_ph%C3%A2n_gi%E1%BA%A3i_t%C3%AAn_mi%E1%BB%81n" title="Hệ thống phân giải tên miền – vietnamesiska" lang="vi" hreflang="vi" data-title="Hệ thống phân giải tên miền" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamesiska" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E5%9F%9F%E5%90%8D%E7%B3%BB%E7%BB%9F" title="域名系统 – wu" lang="wuu" hreflang="wuu" data-title="域名系统" data-language-autonym="吴语" data-language-local-name="wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-yi mw-list-item"><a href="https://yi.wikipedia.org/wiki/DNS" title="DNS – jiddisch" lang="yi" hreflang="yi" data-title="DNS" data-language-autonym="ייִדיש" data-language-local-name="jiddisch" class="interlanguage-link-target"><span>ייִדיש</span></a></li><li class="interlanguage-link interwiki-yo mw-list-item"><a href="https://yo.wikipedia.org/wiki/Domain_Name_System" title="Domain Name System – yoruba" lang="yo" hreflang="yo" data-title="Domain Name System" data-language-autonym="Yorùbá" data-language-local-name="yoruba" class="interlanguage-link-target"><span>Yorùbá</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/DNS" title="DNS – kantonesiska" lang="yue" hreflang="yue" data-title="DNS" data-language-autonym="粵語" data-language-local-name="kantonesiska" class="interlanguage-link-target"><span>粵語</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E5%9F%9F%E5%90%8D%E7%B3%BB%E7%BB%9F" title="域名系统 – kinesiska" lang="zh" hreflang="zh" data-title="域名系统" data-language-autonym="中文" data-language-local-name="kinesiska" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q8767#sitelinks-wikipedia" title="Redigera interwikilänkar" class="wbc-editpage">Redigera länkar</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namnrymder"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Dom%C3%A4nnamnssystemet" title="Visa innehållssidan [c]" accesskey="c"><span>Artikel</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a href="/wiki/Diskussion:Dom%C3%A4nnamnssystemet" rel="discussion" 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class="noexcerpt noprint hanvisning_bas"> <dl><dd><i>Uppslagsordet ”DNS” leder hit.  För strömningsteknisk analysmetod, se <a href="/wiki/Direkt_numerisk_simulering" title="Direkt numerisk simulering">Direkt numerisk simulering</a>.  </i></dd></dl></div> <table class="vertical-navbox nowraplinks" cellspacing="5" style="float: right; clear: right; color: black; background: #f9f9f9; border: 1px solid #aaa; width: 22em; margin: 0 0 1.0em 1.0em; padding: 0.2em; border-spacing: 0.4em 0; text-align: center; line-height: 1.4em; font-size: 88%; ;" cellpadding="0"><tbody><tr> <th class="" style="padding: 0.2em 0.4em 0.2em; font-size: 145%; line-height: 1.2em; font-weight: bold;">Protokollstack för IP-nätverk</th> </tr><tr> <td class="" style="padding-top: 0.2em; font-weight: bold;"><a href="/wiki/Applikationsskikt" title="Applikationsskikt">Applikation</a></td> </tr><tr> <td style="padding-bottom: 0.2em;"> <a href="/wiki/Bittorrent" title="Bittorrent">BitTorrent</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Dynamic_Host_Configuration_Protocol" title="Dynamic Host Configuration Protocol">DHCP</a><span style="font-weight:bold;"> · </span> <a class="mw-selflink selflink">DNS</a><span style="font-weight:bold;"> · </span> <a href="/wiki/File_Transfer_Protocol" title="File Transfer Protocol">FTP</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Hypertext_Transfer_Protocol" title="Hypertext Transfer Protocol">HTTP</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Internet_Message_Access_Protocol" title="Internet Message Access Protocol">IMAP</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Internet_Relay_Chat" title="Internet Relay Chat">IRC</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Network_News_Transfer_Protocol" title="Network News Transfer Protocol">NNTP</a><span style="font-weight:bold;"> · </span> <a href="/wiki/POP3" title="POP3">POP3</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Real-time_Transport_Protocol" title="Real-time Transport Protocol">RTP</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Session_Initiation_Protocol" title="Session Initiation Protocol">SIP</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Simple_Mail_Transfer_Protocol" title="Simple Mail Transfer Protocol">SMTP</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Simple_network_management_protocol" title="Simple network management protocol">SNMP</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Secure_Shell" title="Secure Shell">SSH</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Telnet" title="Telnet">Telnet</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Transport_Layer_Security" title="Transport Layer Security">TLS</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Secure_Sockets_Layer" title="Secure Sockets Layer">SSL</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Trivial_File_Transfer_Protocol" title="Trivial File Transfer Protocol">TFTP</a> <span style="font-weight:bold;"> · </span> <a href="/wiki/Border_Gateway_Protocol" title="Border Gateway Protocol">BGP</a></td> </tr><tr> <td class="" style="padding-top: 0.2em; font-weight: bold;"><a href="/wiki/Transportskikt" title="Transportskikt">Transport</a></td> </tr><tr> <td style="padding-bottom: 0.2em;"> <a href="/wiki/Datagram_Congestion_Control_Protocol" title="Datagram Congestion Control Protocol">DCCP</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Stream_Control_Transmission_Protocol" title="Stream Control Transmission Protocol">SCTP</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Transmission_Control_Protocol" title="Transmission Control Protocol">TCP</a><span style="font-weight:bold;"> · </span> <a href="/wiki/User_Datagram_Protocol" title="User Datagram Protocol">UDP</a><span style="font-weight:bold;"> · </span> <a href="/w/index.php?title=IL_Protocol&action=edit&redlink=1" class="new" title="IL Protocol [inte skriven än]">IL</a><span style="font-weight:bold;"> · </span> <a href="/w/index.php?title=Reliable_User_Datagram_Protocol&action=edit&redlink=1" class="new" title="Reliable User Datagram Protocol [inte skriven än]">RUDP</a></td> </tr><tr> <td class="" style="padding-top: 0.2em; font-weight: bold;"><a href="/wiki/N%C3%A4tverksskikt" title="Nätverksskikt">Nätverk</a></td> </tr><tr> <td style="padding-bottom: 0.2em;"> <a href="/wiki/Address_Resolution_Protocol" title="Address Resolution Protocol">ARP</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Internet_Control_Message_Protocol" title="Internet Control Message Protocol">ICMP</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Internet_Group_Management_Protocol" title="Internet Group Management Protocol">IGMP</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Internetprotokoll" title="Internetprotokoll">IP</a> (<a href="/wiki/IPv4" title="IPv4">IPv4</a><span style="font-weight:bold;"> · </span> <a href="/wiki/IPv6" title="IPv6">IPv6</a>)<span style="font-weight:bold;"> · </span> <a href="/wiki/Routing_Information_Protocol" title="Routing Information Protocol">RIP</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Reverse_Address_Resolution_Protocol" title="Reverse Address Resolution Protocol">RARP</a></td> </tr><tr> <td class="" style="padding-top: 0.2em; font-weight: bold;"><a href="/wiki/Datal%C3%A4nkskikt" title="Datalänkskikt">Länk</a></td> </tr><tr> <td style="padding-bottom: 0.2em;"> <a href="/wiki/Asynchronous_Transfer_Mode_(telekommunikation)" title="Asynchronous Transfer Mode (telekommunikation)">ATM</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Ethernet" title="Ethernet">Ethernet</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Fiber_Distributed_Data_Interface" title="Fiber Distributed Data Interface">FDDI</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Integrated_Services_Digital_Network" title="Integrated Services Digital Network">ISDN</a><span style="font-weight:bold;"> · </span> <a href="/wiki/IS-IS" title="IS-IS">IS-IS</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Multiprotocol_Label_Switching" title="Multiprotocol Label Switching">MPLS</a><span style="font-weight:bold;"> · </span> <a href="/wiki/IEEE_802.5" title="IEEE 802.5">Token Ring</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Point-to-Point_Protocol" title="Point-to-Point Protocol">PPP</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Serial_Line_Internet_Protocol" title="Serial Line Internet Protocol">SLIP</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Wi-Fi" title="Wi-Fi">Wi-Fi</a></td> </tr><tr> <td class="" style="padding-top: 0.2em; font-weight: bold;"><a href="/wiki/Fysiskt_skikt" title="Fysiskt skikt">Fysiskt</a></td> </tr><tr> <td style="padding-bottom: 0.2em;"> <a href="/wiki/IEEE_802" title="IEEE 802">IEEE 802</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Integrated_Services_Digital_Network" title="Integrated Services Digital Network">ISDN</a><span style="font-weight:bold;"> · </span> <a href="/wiki/RS-232" title="RS-232">RS-232</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Infrared_Data_Association" title="Infrared Data Association">IrDA</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Bluetooth" title="Bluetooth">Bluetooth</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Digital_subscriber_line" title="Digital subscriber line">xDSL</a></td> </tr><tr> <td style="text-align: right; font-size: 115%;"><div class="noprint plainlinks" style="background-color:transparent; padding:0; white-space:nowrap; font-weight:normal; font-size:80%; ; color: inherit;"><a href="/wiki/Mall:IPstack" title="Mall:IPstack"><span title="Visa denna mall" style=";">v</span></a> <span style="font-size:80%;">•</span> <a class="external text" href="https://sv.wikipedia.org/w/index.php?title=Mall:IPstack&action=edit"><span style=";" title="Redigera den här mallen">r</span></a></div></td> </tr> </tbody></table> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fil:Domain_name_space.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b1/Domain_name_space.svg/250px-Domain_name_space.svg.png" decoding="async" width="250" height="199" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b1/Domain_name_space.svg/375px-Domain_name_space.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/b1/Domain_name_space.svg/500px-Domain_name_space.svg.png 2x" data-file-width="675" data-file-height="538" /></a><figcaption>Exempel på ett DNS-träd</figcaption></figure> <p><b>Domännamnssystemet</b> eller <b>DNS</b> (från engelskan: <i>Domain Name System</i>) är ett system för att förenkla adressering av datorer på <a href="/wiki/Internetprotokoll" title="Internetprotokoll">IP-nätverk</a> som till exempel <a href="/wiki/Internet" title="Internet">internet</a>. Det kopplar ihop domännamn (av typen www.example.com) med <a href="/wiki/IP-adress" title="IP-adress">IP-adresser</a> (av typen 192.0.2.26), som används för den egentliga kommunikationen.<sup id="cite_ref-:1_1-0" class="reference"><a href="#cite_note-:1-1"><span class="cite-reference-link-bracket">[</span>1<span class="cite-reference-link-bracket">]</span></a></sup> Domännamnssystemet används också som en mer generell databas. DNS är en del av internets infrastruktur och går att likna vid en telefonkatalog som kopplar ihop ett telefonnummer med en person eller ett företag. IP-adressen är nödvändig för att dirigera trafiken på internet.<sup id="cite_ref-:0_2-0" class="reference"><a href="#cite_note-:0-2"><span class="cite-reference-link-bracket">[</span>2<span class="cite-reference-link-bracket">]</span></a></sup> </p><p>På <a href="/wiki/ARPANET" class="mw-redirect" title="ARPANET">ARPANET</a>, internets föregångare, sköttes kopplingen mellan datornamn och IP-adresser med textfiler (HOSTS.TXT, jfr <a href="/wiki/Hosts" title="Hosts">hosts</a>) som innehöll listor på alla datorer man behövde kunna kommunicera med. Då nätet växte blev detta ohållbart.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-reference-link-bracket">[</span>3<span class="cite-reference-link-bracket">]</span></a></sup> DNS uppfanns år 1983 av den amerikanske datavetaren Paul Mockapetris.<sup id="cite_ref-:1_1-1" class="reference"><a href="#cite_note-:1-1"><span class="cite-reference-link-bracket">[</span>1<span class="cite-reference-link-bracket">]</span></a></sup><sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-reference-link-bracket">[</span>4<span class="cite-reference-link-bracket">]</span></a></sup> DNS är ett <a href="/wiki/Distribuerade_system" class="mw-redirect" title="Distribuerade system">distribuerat system</a>, där så kallade zoner av <a href="/wiki/IP-adress" title="IP-adress">IP-nummer</a> delegeras till företag och organisationer, som alltså tar ansvar för sina egna (och eventuellt kunders) IP-adresser. DNS är ett <a href="/wiki/Klient%E2%80%93server" title="Klient–server">klient–server</a>-system där klienten vanligen finns inbyggd i system som kommunicerar genom IP-nätverk. Serverdelen utgörs av så kallade <i>DNS-servrar</i>, som också omnämns <i>domännamnsservrar</i> eller ibland mera slarvigt <i>domänservrar</i>. På internet finns tretton specifika så kallade <i>rotservrar</i> som berättar vilka DNS-servrar som ansvarar för en viss grupp adresser eller domännamn. I allmänhet sker förfrågningarna i flera steg. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Funktion">Funktion</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Dom%C3%A4nnamnssystemet&veaction=edit&section=1" title="Redigera avsnitt: Funktion" class="mw-editsection-visualeditor"><span>redigera</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Dom%C3%A4nnamnssystemet&action=edit&section=1" title="Redigera avsnitts källkod: Funktion"><span>redigera wikitext</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Varje dator i ett IP-nätverk har en egen <a href="/wiki/IP-adress" title="IP-adress">IP-adress</a> i sifferform, och med hjälp av DNS kan man koppla en sådan adress till en adress i textformat. Så istället för att ange IP-adressen "<a rel="nofollow" class="external text" href="http://217.21.237.158">217.21.237.158</a>" i sin <a href="/wiki/Webbl%C3%A4sare" title="Webbläsare">webbläsare</a> när man vill komma till Stockholms stads webbplats kan man använda sig av <a href="/wiki/Dom%C3%A4nnamn" title="Domännamn">domännamnet</a> "www.start.stockholm/" (enbart IP-adressen fungerar inte för alla webbplatser, då domännamnet också används som sådant i <a href="/wiki/HTTP" class="mw-redirect" title="HTTP">HTTP</a>). Man kan alltså förenklat säga, att DNS "översätter" till och från sifferbaserade nätadresser, som är lämpliga när datorer och servrar kommunicerar med varandra, och textbaserade nätadresser, som är enklare att hantera för oss människor. DNS kan också göra bakuppslag där en <a href="/wiki/IP-adress" title="IP-adress">IP-adress</a> omvandlas till ett DNS-namn. </p><p>När en internetanvändare ska besöka en webbplats och skriver in en webbadress, till exempel www.stockholm.se, skickar webbläsaren en förfrågan till användarens internetoperatörs DNS-server. Frågan går att översätta till "vilken IP-adress pekar detta domännamnet till?". Det är inte alltid internetoperatörens DNS-server vet svaret på frågan, men om den har svaret skickar den tillbaka rätt IP-adress så att internetanvändarens dator vet vart den ska ansluta för att kunna besöka webbsidan. Om internetoperatörens DNS-server däremot inte känner till vilken IP-adress www.stockholm.se pekar på så går frågan vidare. För att veta vart DNS-servern ska skicka frågan kontaktar den någon av internets rotservrar (se nedan), som det finns 13 uppsättningar av runt om i världen. Rotservrarna har kännedom om samtliga <a href="/wiki/Toppdom%C3%A4n" title="Toppdomän">toppdomäner</a>, till exempel <a href="/wiki/.se" title=".se">.se</a>, som i sin tur pekar vidare till den namnserver som hanterar domännamnet ifråga (förfrågningarna görs ofta i flera steg, då DNS-servern på varje nivå kan hänvisa till en server med ett mer specifikt ansvarsområde). Internetanvändarens dator får till slut den korrekta IP-adressen som svar på den förfrågan som ursprungligen ställdes. Internetoperatörens DNS-server sparar domännamnets IP-adress med tanke på om en annan abonnent inom kort skulle ställa samma fråga, som då kan besvaras snabbare. Även internetanvändarens egen dator sparar IP-adressen så att den inte behöver ställa samma fråga vid varje återbesök.<sup id="cite_ref-:1_1-2" class="reference"><a href="#cite_note-:1-1"><span class="cite-reference-link-bracket">[</span>1<span class="cite-reference-link-bracket">]</span></a></sup> </p><p>DNS använder sig av både <a href="/wiki/Transmission_control_protocol" class="mw-redirect" title="Transmission control protocol">TCP</a> och <a href="/wiki/UDP" class="mw-redirect" title="UDP">UDP</a> på <a href="/wiki/Port_(datorteknik)" title="Port (datorteknik)">port</a> 53 för att besvara DNS-frågor. Nästan alla DNS-frågor består av en UDP-förfrågan från klienten och ett UDP-svar från servern. TCP används bland annat när datamängden överstiger 512 byte, exempelvis vid <a href="/wiki/Zone_transfer" title="Zone transfer">zonöverföringar</a>. </p><p>DNS är inte bundet till internet utan kan också användas i andra IP-nätverk. </p><p>DNS begränsar sig inte till funktionen att koppla ihop domännamn och IP-adresser. Många andra typer av resurser används allmänt, till exempel MX-posterna, som anger vilken e-postserver som betjänar e-postadresserna för en viss domän. DNS kan också användas som en databas för mer eller mindre godtyckligt data.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-reference-link-bracket">[</span>5<span class="cite-reference-link-bracket">]</span></a></sup> </p><p>Fram till år 2003 fungerade DNS bara med bokstäverna a till z, siffrorna 0 till 9 och bindestreck (och punkt som avskiljare mellan nivåer), men numera går det att använda många andra tecken i domännamnen. Exakt vilka som får användas bestämmer varje <a href="/wiki/Toppdom%C3%A4n" title="Toppdomän">toppdomän</a>.<sup id="cite_ref-:1_1-3" class="reference"><a href="#cite_note-:1-1"><span class="cite-reference-link-bracket">[</span>1<span class="cite-reference-link-bracket">]</span></a></sup> Fortfarande finns denna begränsning kvar på låg nivå, men klientprogramvara omkodar andra tecken till dessa med <a href="/wiki/Punycode" title="Punycode">punycode</a>. Domännamn som använder sådana andra tecken kallas <a href="/wiki/IDN" title="IDN">IDN</a> ("Internationalized Domain Name"). </p><p>DNS-systemet anses vara driftsäkert då det bygger på distribuerade nätverk. I stället för att hela internet förlitar sig på en gemensam databas finns DNS-informationen utspridd över världens DNS-servrar. Att ta ner internets DNS-rotservrar skulle kunna orsaka avbrott på internet, eftersom det då inte skulle gå att hitta IP-adresserna.<sup id="cite_ref-:1_1-4" class="reference"><a href="#cite_note-:1-1"><span class="cite-reference-link-bracket">[</span>1<span class="cite-reference-link-bracket">]</span></a></sup> Sådana försök har skett, bland annat år 2016 när DNS-leverantören <a href="/w/index.php?title=Dyn_(f%C3%B6retag)&action=edit&redlink=1" class="new" title="Dyn (företag) [inte skriven än]">Dyns</a> servrar utsattes för <a href="/wiki/%C3%96verbelastningsattacker" class="mw-redirect" title="Överbelastningsattacker">överbelastningsattacker</a>. Dyn är ansvarig för infrastrukturen för populära tjänster som <a href="/wiki/Twitter" title="Twitter">Twitter</a>, <a href="/wiki/Paypal" title="Paypal">Paypal</a>, <a href="/wiki/Reddit" title="Reddit">Reddit</a> och <a href="/wiki/Spotify" title="Spotify">Spotify</a> vilket medförde att attackerna orsakade störningar för många av tjänsternas användare.<sup id="cite_ref-:0_2-1" class="reference"><a href="#cite_note-:0-2"><span class="cite-reference-link-bracket">[</span>2<span class="cite-reference-link-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Rotserver">Rotserver</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Dom%C3%A4nnamnssystemet&veaction=edit&section=2" title="Redigera avsnitt: Rotserver" class="mw-editsection-visualeditor"><span>redigera</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Dom%C3%A4nnamnssystemet&action=edit&section=2" title="Redigera avsnitts källkod: Rotserver"><span>redigera wikitext</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>DNS-servrar, domännamnsserver, på internet. För att en DNS-server på internet ska ha någonting att utgå ifrån när den får en fråga rörande en zon den inte vet något om, finns det 13 delegerade så kallade rotservrar världen över, varav en, <i>i.root-servers.net</i>, opereras av svenska <a href="/wiki/Netnod" title="Netnod">Netnod</a>. Bakom de 13 namngivna root-servrarna finns hundratals maskiner<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-reference-link-bracket">[</span>6<span class="cite-reference-link-bracket">]</span></a></sup> som ser till att det finns kapacitet nog att hantera den trafik som kommer till root. Samtliga <a href="/wiki/Toppdom%C3%A4n" title="Toppdomän">toppdomäner</a> delegeras från root-servrarna. En toppdomän är den del som avslutar domännamnet, exempelvis <i>.org</i>, <i>.se</i> eller <i>.eu</i>. </p> <div class="mw-heading mw-heading2"><h2 id="Dynamisk_DNS">Dynamisk DNS</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Dom%C3%A4nnamnssystemet&veaction=edit&section=3" title="Redigera avsnitt: Dynamisk DNS" class="mw-editsection-visualeditor"><span>redigera</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Dom%C3%A4nnamnssystemet&action=edit&section=3" title="Redigera avsnitts källkod: Dynamisk DNS"><span>redigera wikitext</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Eftersom de flesta <a href="/wiki/Internetleverant%C3%B6r" title="Internetleverantör">internetleverantörer</a> ("ISP") tilldelar IP-adresser dynamiskt till sina kunder istället för att tilldela dem ett fast nummer, så har det tidigare varit svårt för de flesta internetanvändare att koppla ett eget domännamn till en egen dator. Detta har lösts genom så kallade <i>dynamiska DNS-servrar</i>. Dessa servrar kan, med hjälp av ett litet program som installeras på datorn, dynamiskt uppdateras så ofta som det behövs med den IP-adress som gäller vid varje tillfälle. Därmed kan man nå datorn på basen av ett fast domännamn. Servrarna upprätthålls ofta av tredje part, varvid en förfrågan enligt IP-adress ("reverse DNS") inte ger det domännamn kunden önskar. Att sambandet mellan IP-adress och domännamn är inkonsekvent på detta sätt (vilket inte är helt ovanligt heller i webbhotell) kan göra att servern betraktas som opålitlig. </p> <div class="mw-heading mw-heading2"><h2 id="Vanliga_posttyper_i_DNS">Vanliga posttyper i DNS</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Dom%C3%A4nnamnssystemet&veaction=edit&section=4" title="Redigera avsnitt: Vanliga posttyper i DNS" class="mw-editsection-visualeditor"><span>redigera</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Dom%C3%A4nnamnssystemet&action=edit&section=4" title="Redigera avsnitts källkod: Vanliga posttyper i DNS"><span>redigera wikitext</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>I DNS finns ett antal olika typer av poster specificerade. De vanligaste av dessa är: </p> <ul><li>A, <i>Host address</i> – kopplar namn till IP-adress i <a href="/wiki/IPv4" title="IPv4">IPv4</a></li> <li>AAAA, <i>Host address</i> – kopplar namn till IP-adress i <a href="/wiki/IPv6" title="IPv6">IPv6</a></li> <li><a href="/wiki/CNAME_record" title="CNAME record">CNAME</a>, <i>Canonical name for an alias</i> – hanterar alias</li> <li>MX, <i>Mail exchange</i> – specificerar vilka servrar som hanterar e-post åt en viss domän</li> <li>NS, <i>Authoritative name server</i> – specificerar den DNS-server som är ansvarig för zonen</li> <li>PTR, <i>Domain name pointer</i> – en variant av CNAME, används främst för att koppla en IP-adress till ett namn ("reverse lookup")</li> <li>SOA, <i>Start of authority</i> – markerar starten på en ny zon</li> <li>SRV, <i>Service records</i> – variant av MX, men som kan användas för godtyckliga tjänster (t.ex. <a href="/wiki/XMPP" class="mw-redirect" title="XMPP">XMPP</a>)</li> <li>TXT, <i>Text strings</i> – används för kommentarer och numera även till exempelvis publicering av <a href="/wiki/Sender_Policy_Framework" title="Sender Policy Framework">Sender Policy Framework</a></li></ul> <p>Dessa posttyper (kallade RR, Resource Record) finns specificerade i diverse <a href="/wiki/Request_for_Comments" title="Request for Comments">RFC</a>:er, och registrerade av <a href="/wiki/Internet_Assigned_Numbers_Authority" title="Internet Assigned Numbers Authority">IANA</a>.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-reference-link-bracket">[</span>7<span class="cite-reference-link-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="DNSSEC">DNSSEC</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Dom%C3%A4nnamnssystemet&veaction=edit&section=5" title="Redigera avsnitt: DNSSEC" class="mw-editsection-visualeditor"><span>redigera</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Dom%C3%A4nnamnssystemet&action=edit&section=5" title="Redigera avsnitts källkod: DNSSEC"><span>redigera wikitext</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><i>Domain Name System Security Extensions</i>, är en utvidgning av DNS-systemet som syftar till att öka säkerheten i DNS. Detta säkerhetstillägg har utvecklats med målet att förhindra missbruk där man lurar DNS-systemet med falsk information genom så kallad <a href="/w/index.php?title=Cachef%C3%B6rgiftning&action=edit&redlink=1" class="new" title="Cacheförgiftning [inte skriven än]">cacheförgiftning</a>. DNSSEC använder sig av kryptografiska signaturer för att säkerställa att DNS-svaret kommer från rätt källa och att data inte har manipulerats under överföringen.<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-reference-link-bracket">[</span>8<span class="cite-reference-link-bracket">]</span></a></sup><sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-reference-link-bracket">[</span>9<span class="cite-reference-link-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Specifikation">Specifikation</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Dom%C3%A4nnamnssystemet&veaction=edit&section=6" title="Redigera avsnitt: Specifikation" class="mw-editsection-visualeditor"><span>redigera</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Dom%C3%A4nnamnssystemet&action=edit&section=6" title="Redigera avsnitts källkod: Specifikation"><span>redigera wikitext</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Standarden för DNS specificeras ursprungligen i <a href="//tools.ietf.org/html/rfc882" class="extiw" title="rfc:882">RFC 882</a>. År <a href="/wiki/1987" title="1987">1987</a> uppdaterades DNS i och med publiceringen av <a href="//tools.ietf.org/html/rfc1034" class="extiw" title="rfc:1034">RFC 1034</a> och <a href="//tools.ietf.org/html/rfc1035" class="extiw" title="rfc:1035">RFC 1035</a>. Flera ytterligare RFC:er har publicerats som specificerar olika utökningar till grundprotokollet. </p> <div class="mw-heading mw-heading2"><h2 id="Källor"><span id="K.C3.A4llor"></span>Källor</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Dom%C3%A4nnamnssystemet&veaction=edit&section=7" title="Redigera avsnitt: Källor" class="mw-editsection-visualeditor"><span>redigera</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Dom%C3%A4nnamnssystemet&action=edit&section=7" title="Redigera avsnitts källkod: Källor"><span>redigera wikitext</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-:1-1">^ [<a href="#cite_ref-:1_1-0"><small>a</small></a> <a href="#cite_ref-:1_1-1"><small>b</small></a> <a href="#cite_ref-:1_1-2"><small>c</small></a> <a href="#cite_ref-:1_1-3"><small>d</small></a> <a href="#cite_ref-:1_1-4"><small>e</small></a>] <span class="reference-text"><cite style="font-style:normal" class="web"><a rel="nofollow" class="external text" href="https://internetkunskap.se/sa-funkar-internet/dns-internets-raddning/">”Så funkar DNS – internets räddning”</a>. <i><span>Internetkunskap</span></i>. 20 oktober 2020<span class="printonly">. <a rel="nofollow" class="external free" href="https://internetkunskap.se/sa-funkar-internet/dns-internets-raddning/">https://internetkunskap.se/sa-funkar-internet/dns-internets-raddning/</a></span><span class="reference-accessdate">. Läst 4 mars 2021</span>.</cite><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=bookitem&rft.btitle=S%C3%A5+funkar+DNS+%E2%80%93+internets+r%C3%A4ddning&rft.atitle=Internetkunskap&rft.date=20+oktober+2020&rft_id=https%3A%2F%2Finternetkunskap.se%2Fsa-funkar-internet%2Fdns-internets-raddning%2F&rfr_id=info:sid/en.wikipedia.org:Dom%C3%A4nnamnssystemet"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-:0-2">^ [<a href="#cite_ref-:0_2-0"><small>a</small></a> <a href="#cite_ref-:0_2-1"><small>b</small></a>] <span class="reference-text"><cite style="font-style:normal" class="web"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20210302084409/https://internetkunskap.se/sa-funkar-internet/gar-det-att-stanga-av-internet/">”Skulle det gå att stänga av internet?”</a>. <i><span>Internetkunskap</span></i>. 3 november 2020. Arkiverad från <a rel="nofollow" class="external text" href="https://internetkunskap.se/sa-funkar-internet/gar-det-att-stanga-av-internet/">originalet</a> den 2 mars 2021<span class="printonly">. <a rel="nofollow" class="external free" href="https://web.archive.org/web/20210302084409/https://internetkunskap.se/sa-funkar-internet/gar-det-att-stanga-av-internet/">https://web.archive.org/web/20210302084409/https://internetkunskap.se/sa-funkar-internet/gar-det-att-stanga-av-internet/</a></span><span class="reference-accessdate">. Läst 26 februari 2021</span>.</cite><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=bookitem&rft.btitle=Skulle+det+g%C3%A5+att+st%C3%A4nga+av+internet%3F&rft.atitle=Internetkunskap&rft.date=3+november+2020&rft_id=https%3A%2F%2Fweb.archive.org%2Fweb%2F20210302084409%2Fhttps%3A%2F%2Finternetkunskap.se%2Fsa-funkar-internet%2Fgar-det-att-stanga-av-internet%2F&rfr_id=info:sid/en.wikipedia.org:Dom%C3%A4nnamnssystemet"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-3"><a href="#cite_ref-3">^</a> <span class="reference-text"><cite style="font-style:normal" class="web"><a rel="nofollow" class="external text" href="https://datatracker.ietf.org/doc/html/rfc1034">”RFC 1034: Domain names – Concepts and facilities”</a>. 1 november 1987<span class="printonly">. <a rel="nofollow" class="external free" href="https://datatracker.ietf.org/doc/html/rfc1034">https://datatracker.ietf.org/doc/html/rfc1034</a></span><span class="reference-accessdate">. Läst 30 augusti 2021</span>.</cite><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=bookitem&rft.btitle=RFC+1034%3A+Domain+names+%E2%80%93+Concepts+and+facilities&rft.atitle=&rft.date=1+november+1987&rft_id=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fhtml%2Frfc1034&rfr_id=info:sid/en.wikipedia.org:Dom%C3%A4nnamnssystemet"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-4"><a href="#cite_ref-4">^</a> <span class="reference-text"><cite style="font-style:normal" class="web"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20120826032920/http://www3.isi.edu/about-news_story.htm?s=54">”ISI Names Dr. Paul Mockapetris Visiting Scholar”</a>. USC Viterbi School of Engineering. 27 mars 2003. Arkiverad från <a rel="nofollow" class="external text" href="http://www3.isi.edu/about-news_story.htm?s=54">originalet</a> den 26 augusti 2012<span class="printonly">. <a rel="nofollow" class="external free" href="https://web.archive.org/web/20120826032920/http://www3.isi.edu/about-news_story.htm?s=54">https://web.archive.org/web/20120826032920/http://www3.isi.edu/about-news_story.htm?s=54</a></span><span class="reference-accessdate">. Läst 22 december 2022</span>.</cite><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=bookitem&rft.btitle=ISI+Names+Dr.+Paul+Mockapetris+Visiting+Scholar&rft.atitle=&rft.date=27+mars+2003&rft.pub=USC+Viterbi+School+of+Engineering&rft_id=https%3A%2F%2Fweb.archive.org%2Fweb%2F20120826032920%2Fhttp%3A%2F%2Fwww3.isi.edu%2Fabout-news_story.htm%3Fs%3D54&rfr_id=info:sid/en.wikipedia.org:Dom%C3%A4nnamnssystemet"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-5"><a href="#cite_ref-5">^</a> <span class="reference-text"><cite style="font-style:normal" class="web"><a rel="nofollow" class="external text" href="http://tools.ietf.org/html/rfc2181#section-11">”</a><a href="//tools.ietf.org/html/rfc2181" class="extiw" title="rfc:2181">RFC 2181</a> Clarifications to the DNS Specification”. Juli 1997. sid. 13<span class="printonly">. <a rel="nofollow" class="external free" href="http://tools.ietf.org/html/rfc2181#section-11">http://tools.ietf.org/html/rfc2181#section-11</a></span><span class="reference-accessdate">. Läst 7 april 2014</span>.</cite><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=bookitem&rft.btitle=%5B%5BRFC%3A2181%7CRFC+2181%5D%5D+Clarifications+to+the+DNS+Specification&rft.atitle=&rft.date=Juli+1997&rft.pages=sid.%26nbsp%3B13&rft_id=http%3A%2F%2Ftools.ietf.org%2Fhtml%2Frfc2181%23section-11&rfr_id=info:sid/en.wikipedia.org:Dom%C3%A4nnamnssystemet"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-6"><a href="#cite_ref-6">^</a> <span class="reference-text"><cite style="font-style:normal" class="web"><a rel="nofollow" class="external text" href="http://www.root-servers.org/">”Root Server Technical Operations Assn”</a>. <i><span>www.root-servers.org</span></i><span class="printonly">. <a rel="nofollow" class="external free" href="http://www.root-servers.org/">http://www.root-servers.org/</a></span><span class="reference-accessdate">. Läst 1 mars 2016</span>.</cite><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=bookitem&rft.btitle=Root+Server+Technical+Operations+Assn&rft.atitle=www.root-servers.org&rft_id=http%3A%2F%2Fwww.root-servers.org%2F&rfr_id=info:sid/en.wikipedia.org:Dom%C3%A4nnamnssystemet"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-7"><a href="#cite_ref-7">^</a> <span class="reference-text"><cite style="font-style:normal" class="web"><a rel="nofollow" class="external text" href="http://www.iana.org/assignments/dns-parameters">”Domain Name System (DNS) Parameter”</a> (på engelska). <a href="/wiki/Internet_Assigned_Numbers_Authority" title="Internet Assigned Numbers Authority">IANA</a>. 23 juli 2010<span class="printonly">. <a rel="nofollow" class="external free" href="http://www.iana.org/assignments/dns-parameters">http://www.iana.org/assignments/dns-parameters</a></span><span class="reference-accessdate">. Läst 20 december 2010</span>.</cite><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=bookitem&rft.btitle=Domain+Name+System+%28DNS%29+Parameter&rft.atitle=&rft.date=23+juli+2010&rft.pub=%5B%5BInternet+Assigned+Numbers+Authority%7CIANA%5D%5D&rft_id=http%3A%2F%2Fwww.iana.org%2Fassignments%2Fdns-parameters&rfr_id=info:sid/en.wikipedia.org:Dom%C3%A4nnamnssystemet"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-8"><a href="#cite_ref-8">^</a> <span class="reference-text"><cite style="font-style:normal" class="book" id="CITEREFRaunio2010">Raunio, Björn (2010). <i><span>DNS - Internets vägvisare</span></i></cite><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=DNS+-+Internets+v%C3%A4gvisare&rft.aulast=Raunio&rft.aufirst=Bj%C3%B6rn&rft.au=Raunio%2C+Bj%C3%B6rn&rft.date=2010&rfr_id=info:sid/en.wikipedia.org:Dom%C3%A4nnamnssystemet"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-9"><a href="#cite_ref-9">^</a> <span class="reference-text"><cite style="font-style:normal" class="web"><a rel="nofollow" class="external text" href="http://www.rfc-archive.org/getrfc.php?rfc=4033">”</a><a href="//tools.ietf.org/html/rfc4033" class="extiw" title="rfc:4033">RFC 4033</a> - DNS Security Introduction and Requirements”<span class="printonly">. <a rel="nofollow" class="external free" href="http://www.rfc-archive.org/getrfc.php?rfc=4033">http://www.rfc-archive.org/getrfc.php?rfc=4033</a></span><span class="reference-accessdate">. Läst 20 oktober 2011</span>.</cite><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=bookitem&rft.btitle=%5B%5BRFC%3A4033%7CRFC+4033%5D%5D+-+DNS+Security+Introduction+and+Requirements&rft.atitle=&rft_id=http%3A%2F%2Fwww.rfc-archive.org%2Fgetrfc.php%3Frfc%3D4033&rfr_id=info:sid/en.wikipedia.org:Dom%C3%A4nnamnssystemet"><span style="display: none;"> </span></span></span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="Externa_länkar"><span id="Externa_l.C3.A4nkar"></span>Externa länkar</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Dom%C3%A4nnamnssystemet&veaction=edit&section=8" title="Redigera avsnitt: Externa länkar" class="mw-editsection-visualeditor"><span>redigera</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Dom%C3%A4nnamnssystemet&action=edit&section=8" title="Redigera avsnitts källkod: Externa länkar"><span>redigera wikitext</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><span typeof="mw:File"><span><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/15px-Commons-logo.svg.png" decoding="async" width="15" height="20" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/23px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></span></span> Wikimedia Commons har media som rör <a href="https://commons.wikimedia.org/wiki/Category:Domain_name_system" class="extiw" title="commons:Category:Domain name system">Domännamnssystemet</a>.<div class="interProject commons" style="display:none;"><a href="https://commons.wikimedia.org/wiki/Category:Domain_name_system" class="extiw" title="commons:Category:Domain name system">Bilder & media</a></div></li> <li><a rel="nofollow" class="external text" href="https://www.iis.se/lar-dig-mer/guider/dns-internets-vagvisare/">En genomgång av DNS på svenska</a></li> <li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20071231071754/http://aplawrence.com/Blog/basic_dns_swedish.html">Grunder i DNS: PTR-poster, och varför de är viktiga</a></li> <li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20081118021124/https://www.isc.org/software/bind/">ISC: Bind</a> <span style="font-size:.95em;font-weight:bold;color:var(--color-subtle, #54595d);">(engelska)</span></li> <li><a rel="nofollow" class="external text" href="http://nlnetlabs.nl/projects/nsd/">NLNet: nsd</a> <span style="font-size:.95em;font-weight:bold;color:var(--color-subtle, #54595d);">(engelska)</span></li></ul> <style data-mw-deduplicate="TemplateStyles:r56287950">.mw-parser-output table.navbox{border:#aaa 1px solid;width:100%;margin:auto;margin-top:1em;clear:both;font-size:88%;text-align:center;padding:1px}.mw-parser-output link+table.navbox{margin-top:-1px}.mw-parser-output .navbox-title,.mw-parser-output .navbox-abovebelow,.mw-parser-output table.navbox th{text-align:center;padding-left:1em;padding-right:1em}.mw-parser-output .navbox-thlinkcolor .navbox-title button,.mw-parser-output .navbox-thlinkcolor .navbox-title .mw-collapsible-text,.mw-parser-output .navbox-thlinkcolor .navbox-title a{color:inherit}.mw-parser-output .nowraplinks a,.mw-parser-output .nowraplinks .selflink{white-space:nowrap}.mw-parser-output .navbox-group{white-space:nowrap;text-align:right;font-weight:bold;padding-left:1em;padding-right:1em}.mw-parser-output .navbox,.mw-parser-output .navbox-subgroup{background:#fdfdfd}.mw-parser-output .navbox-list{border-color:#fdfdfd}.mw-parser-output .navbox-title,.mw-parser-output table.navbox th{background:#b0c4de}.mw-parser-output .navbox-abovebelow,.mw-parser-output .navbox-group,.mw-parser-output .navbox-subgroup .navbox-title{background:#d0e0f5}.mw-parser-output .navbox-subgroup .navbox-group,.mw-parser-output .navbox-subgroup .navbox-abovebelow{background:#deeafa}.mw-parser-output .navbox-even{background:#f7f7f7}.mw-parser-output .navbox-odd{background:transparent}</style><table class="navbox" style="border-spacing:0; ;"><tbody><tr><td style="padding:2px;"><table class="collapsible autocollapse" style="width:100%;border-spacing:0;background:transparent;color:inherit;;"><tbody><tr><th style=";" colspan="3" class="navbox-title"><div style="float:left; width:3em;text-align:left;"><div class="noprint plainlinks" style="background-color:transparent; padding:0; white-space:nowrap; font-weight:normal; font-size:80%; border:none;; color: inherit;"><a href="/wiki/Mall:Internet" title="Mall:Internet"><span title="Visa denna mall" style="border:none;;">v</span></a> <span style="font-size:80%;">•</span> <a class="external text" href="https://sv.wikipedia.org/w/index.php?title=Mall:Internet&action=edit"><span style="border:none;;" title="Redigera den här mallen">r</span></a></div></div><span style="font-size:110%;"><a href="/wiki/Internet" title="Internet">Internet</a></span></th></tr><tr style="height:2px;"><td></td></tr><tr><td class="navbox-group" style=";;">Allmänt</td><td style="text-align:left;border-left:2px solid #fdfdfd;width:100%;padding:0px;;;" class="navbox-list navbox-odd"><div style="padding:0em 0.25em"><a href="/wiki/Digital_klyfta" title="Digital klyfta">digital klyfta</a><span style="font-weight:bold;"> · </span><a href="/wiki/Digitala_r%C3%A4ttigheter" title="Digitala rättigheter">digitala rättigheter</a><span style="font-weight:bold;"> · </span><a href="/wiki/E-demokrati" title="E-demokrati">e-demokrati</a><span style="font-weight:bold;"> · </span><a href="/wiki/Informationsfrihet" title="Informationsfrihet">informationsfrihet</a><span style="font-weight:bold;"> · </span><a href="/wiki/Netikett" title="Netikett">netikett</a><span style="font-weight:bold;"> · </span><a href="/wiki/N%C3%A4tneutralitet" title="Nätneutralitet">nätneutralitet</a><span style="font-weight:bold;"> · </span><a href="/wiki/Internetuppkoppling" title="Internetuppkoppling">uppkoppling</a> (<i><a href="/wiki/Bredband" title="Bredband">bredband</a></i>)</div></td><td style="width:0%;padding:0px 0px 0px 2px;" rowspan="9"><span typeof="mw:File"><a href="/wiki/Fil:Internet_map_1024_-_transparent,_inverted.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/3f/Internet_map_1024_-_transparent%2C_inverted.png/80px-Internet_map_1024_-_transparent%2C_inverted.png" decoding="async" width="80" height="80" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/3f/Internet_map_1024_-_transparent%2C_inverted.png/120px-Internet_map_1024_-_transparent%2C_inverted.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/3f/Internet_map_1024_-_transparent%2C_inverted.png/160px-Internet_map_1024_-_transparent%2C_inverted.png 2x" data-file-width="1280" data-file-height="1280" /></a></span></td></tr><tr style="height:2px"><td></td></tr><tr><td class="navbox-group" style=";;">Administration</td><td style="text-align:left;border-left:2px solid #fdfdfd;width:100%;padding:0px;;;" class="navbox-list navbox-even"><div style="padding:0em 0.25em"><a href="/wiki/Internet_Assigned_Numbers_Authority" title="Internet Assigned Numbers Authority">IANA</a><span style="font-weight:bold;"> · </span><a href="/wiki/Internet_Corporation_for_Assigned_Names_and_Numbers" title="Internet Corporation for Assigned Names and Numbers">ICANN</a><span style="font-weight:bold;"> · </span><a href="/wiki/Internet_Engineering_Task_Force" title="Internet Engineering Task Force">IETF</a><span style="font-weight:bold;"> · </span><a href="/wiki/Internet_Society" title="Internet Society">ISOC</a></div></td></tr><tr style="height:2px"><td></td></tr><tr><td class="navbox-group" style=";;">Protokoll</td><td style="text-align:left;border-left:2px solid #fdfdfd;width:100%;padding:0px;;;" class="navbox-list navbox-odd"><div style="padding:0em 0.25em"><a class="mw-selflink selflink">DNS</a><span style="font-weight:bold;"> · </span><a href="/wiki/File_Transfer_Protocol" title="File Transfer Protocol">FTP</a><span style="font-weight:bold;"> · </span><a href="/wiki/Hypertext_Transfer_Protocol" title="Hypertext Transfer Protocol">HTTP</a> (<i><a href="/wiki/Hypertext" title="Hypertext">hypertext</a></i>)<span style="font-weight:bold;"> · </span><a href="/wiki/Internet_Message_Access_Protocol" title="Internet Message Access Protocol">IMAP</a><span style="font-weight:bold;"> · </span><a href="/wiki/Internetforum" title="Internetforum">Internetforum</a><span style="font-weight:bold;"> · </span><a href="/wiki/Internetknutpunkt" title="Internetknutpunkt">Internetknutpunkt</a><span style="font-weight:bold;"> · </span><a href="/wiki/Internetleverant%C3%B6r" title="Internetleverantör">Internetleverantör</a><span style="font-weight:bold;"> · </span><a href="/wiki/IP-adress" title="IP-adress">IP-adress</a><span style="font-weight:bold;"> · </span><a href="/wiki/Simple_Mail_Transfer_Protocol" title="Simple Mail Transfer Protocol">SMTP</a><span style="font-weight:bold;"> · </span><a href="/wiki/TCP/IP" title="TCP/IP">TCP/IP</a> (<i><a href="/wiki/Transmission_Control_Protocol" title="Transmission Control Protocol">TCP</a><span style="font-weight:bold;"> · </span><a href="/wiki/Internetprotokoll" title="Internetprotokoll">IP-protokollet</a></i>)<span style="font-weight:bold;"> · </span><a href="/wiki/Usenet" title="Usenet">Usenet</a></div></td></tr><tr style="height:2px"><td></td></tr><tr><td class="navbox-group" style=";;">Tjänster</td><td style="text-align:left;border-left:2px solid #fdfdfd;width:100%;padding:0px;;;" class="navbox-list navbox-even"><div style="padding:0em 0.25em"><a href="/wiki/Blogg" title="Blogg">blogg</a> (<i><a href="/wiki/Mikroblogg" title="Mikroblogg">mikroblogg</a></i>)<span style="font-weight:bold;"> · </span><a href="/wiki/Chatt" title="Chatt">chatt</a> (<i><a href="/wiki/Snabbmeddelanden" title="Snabbmeddelanden">snabbmeddelanden</a></i>)<span style="font-weight:bold;"> · </span><a href="/wiki/E-handel" title="E-handel">e-handel</a><span style="font-weight:bold;"> · </span><a href="/wiki/E-post" title="E-post">e-post</a><span style="font-weight:bold;"> · </span><a href="/wiki/Fildelning" title="Fildelning">fildelning</a><span style="font-weight:bold;"> · </span><a href="/wiki/IP-telefoni" title="IP-telefoni">IP-telefoni</a><span style="font-weight:bold;"> · </span><a href="/wiki/Katalogtj%C3%A4nst" title="Katalogtjänst">katalogtjänst</a><span style="font-weight:bold;"> · </span><a href="/wiki/Onlinespel" title="Onlinespel">onlinespel</a><span style="font-weight:bold;"> · </span><a href="/wiki/Poddradio" title="Poddradio">podd</a><span style="font-weight:bold;"> · </span><a href="/wiki/Sociala_medier" title="Sociala medier">sociala medier</a><span style="font-weight:bold;"> · </span><a href="/wiki/Str%C3%B6mmande_media" title="Strömmande media">strömmande media</a> (<i><a href="/wiki/Webb-TV" title="Webb-TV">webb-TV</a></i>)<span style="font-weight:bold;"> · </span><a href="/wiki/S%C3%B6ktj%C3%A4nst" title="Söktjänst">söktjänst</a><span style="font-weight:bold;"> · </span><a href="/wiki/World_Wide_Web" class="mw-redirect" title="World Wide Web">webben</a><span style="font-weight:bold;"> · </span><a href="/wiki/Webbkonferens" title="Webbkonferens">webbkonferens</a></div></td></tr><tr style="height:2px"><td></td></tr><tr><td class="navbox-group" style=";;">Historia</td><td style="text-align:left;border-left:2px solid #fdfdfd;width:100%;padding:0px;;;" class="navbox-list navbox-odd"><div style="padding:0em 0.25em"><a href="/wiki/Internets_historia" title="Internets historia">Internets historia</a> (<i><a href="/wiki/Internets_historia_i_Sverige" title="Internets historia i Sverige">Sverige</a></i>)</div></td></tr></tbody></table></td></tr></tbody></table> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r56287950"><table cellspacing="0" class="navbox" style="border-spacing:0;"><tbody><tr><td style="padding:2px;"><table cellspacing="0" class="nowraplinks hlist auktoritetsdata navbox-inner" style="border-spacing:0;background:transparent;color:inherit;"><tbody><tr><th scope="row" class="navbox-group"><a href="/wiki/Auktoritetsdata" title="Auktoritetsdata">Auktoritetsdata</a></th><td class="navbox-list navbox-odd" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px;"><div style="padding:0em 0.25em;"> • <a href="/wiki/Gemeinsame_Normdatei" title="Gemeinsame Normdatei">GND</a>: <span class="uid"><a rel="nofollow" class="external text" href="http://d-nb.info/gnd/4348318-5">4348318-5</a></span> • <a href="/wiki/Nationella_parlamentsbiblioteket" title="Nationella parlamentsbiblioteket">NDL</a>: <span class="uid"><a rel="nofollow" class="external text" href="http://id.ndl.go.jp/auth/ndlna/001311891">001311891</a></span></div></td></tr></tbody></table></td></tr></tbody></table>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Hämtad från ”<a dir="ltr" href="https://sv.wikipedia.org/w/index.php?title=Domännamnssystemet&oldid=54985718">https://sv.wikipedia.org/w/index.php?title=Domännamnssystemet&oldid=54985718</a>”</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Wikipedia:Kategorier" title="Wikipedia:Kategorier">Kategorier</a>: 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