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href="https://be-tarask.wikipedia.org/wiki/%D0%90%D0%BA%D1%82%D1%8D%D1%82_(%D1%96%D0%BD%D1%84%D0%B0%D1%80%D0%BC%D0%B0%D1%82%D1%8B%D0%BA%D0%B0)" title="Актэт (інфарматыка) – Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="Актэт (інфарматыка)" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="Belarusian (Taraškievica orthography)" 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/%D0%9E%D0%BA%D1%82%D0%B5%D1%82" title="Октет – Bulgarian" lang="bg" hreflang="bg" data-title="Октет" data-language-autonym="Български" data-language-local-name="Bulgarian" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-br mw-list-item"><a href="https://br.wikipedia.org/wiki/Eizhbit" title="Eizhbit – Breton" lang="br" hreflang="br" data-title="Eizhbit" data-language-autonym="Brezhoneg" data-language-local-name="Breton" class="interlanguage-link-target"><span>Brezhoneg</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Oktet_(informatika)" title="Oktet (informatika) – Czech" lang="cs" hreflang="cs" data-title="Oktet (informatika)" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Oktett_(Informatik)" title="Oktett (Informatik) – German" lang="de" hreflang="de" data-title="Oktett (Informatik)" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D9%87%D8%B4%D8%AA%E2%80%8C%D8%AA%D8%A7%DB%8C%DB%8C" title="هشت‌تایی – Persian" lang="fa" hreflang="fa" data-title="هشت‌تایی" data-language-autonym="فارسی" data-language-local-name="Persian" 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/Octet" title="Octet – French" lang="fr" hreflang="fr" data-title="Octet" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Ochtr%C3%A9ad" title="Ochtréad – Irish" lang="ga" hreflang="ga" data-title="Ochtréad" data-language-autonym="Gaeilge" data-language-local-name="Irish" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%98%A5%ED%85%9F_(%EC%BB%B4%ED%93%A8%ED%8C%85)" title="옥텟 (컴퓨팅) – Korean" lang="ko" hreflang="ko" data-title="옥텟 (컴퓨팅)" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Oktet_(ra%C4%8Dunarstvo)" title="Oktet (računarstvo) – Croatian" lang="hr" hreflang="hr" data-title="Oktet (računarstvo)" data-language-autonym="Hrvatski" data-language-local-name="Croatian" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Oktets_(inform%C4%81tika)" title="Oktets (informātika) – Latvian" lang="lv" hreflang="lv" data-title="Oktets (informātika)" data-language-autonym="Latviešu" data-language-local-name="Latvian" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%9E%D0%BA%D1%82%D0%B5%D1%82_(%D0%B8%D0%BD%D1%84%D0%BE%D1%80%D0%BC%D0%B0%D1%82%D0%B8%D0%BA%D0%B0)" title="Октет (информатика) – Macedonian" lang="mk" hreflang="mk" data-title="Октет (информатика)" data-language-autonym="Македонски" data-language-local-name="Macedonian" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-mg mw-list-item"><a href="https://mg.wikipedia.org/wiki/Oktety" title="Oktety – Malagasy" lang="mg" hreflang="mg" data-title="Oktety" data-language-autonym="Malagasy" data-language-local-name="Malagasy" class="interlanguage-link-target"><span>Malagasy</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%82%AA%E3%82%AF%E3%83%86%E3%83%83%E3%83%88_(%E3%82%B3%E3%83%B3%E3%83%94%E3%83%A5%E3%83%BC%E3%82%BF)" title="オクテット (コンピュータ) – Japanese" lang="ja" hreflang="ja" data-title="オクテット (コンピュータ)" data-language-autonym="日本語" data-language-local-name="Japanese" 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/Oktett_(data)" title="Oktett (data) – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="Oktett (data)" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegian Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pcd mw-list-item"><a href="https://pcd.wikipedia.org/wiki/Octet" title="Octet – Picard" lang="pcd" hreflang="pcd" data-title="Octet" data-language-autonym="Picard" data-language-local-name="Picard" class="interlanguage-link-target"><span>Picard</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Oktet_(informatyka)" title="Oktet (informatyka) – Polish" lang="pl" hreflang="pl" data-title="Oktet (informatyka)" data-language-autonym="Polski" data-language-local-name="Polish" 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/Octeto_(computa%C3%A7%C3%A3o)" title="Octeto (computação) – Portuguese" lang="pt" hreflang="pt" data-title="Octeto (computação)" data-language-autonym="Português" data-language-local-name="Portuguese" 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/Octet" title="Octet – Romanian" lang="ro" hreflang="ro" data-title="Octet" data-language-autonym="Română" data-language-local-name="Romanian" 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/%D0%9E%D0%BA%D1%82%D0%B5%D1%82_(%D0%B8%D0%BD%D1%84%D0%BE%D1%80%D0%BC%D0%B0%D1%82%D0%B8%D0%BA%D0%B0)" title="Октет (информатика) – Russian" lang="ru" hreflang="ru" data-title="Октет (информатика)" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Octet" title="Octet – Simple English" lang="en-simple" hreflang="en-simple" data-title="Octet" 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-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%9E%D0%BA%D1%82%D0%B5%D1%82_(%D1%80%D0%B0%D1%87%D1%83%D0%BD%D0%B0%D1%80%D1%81%D1%82%D0%B2%D0%BE)" title="Октет (рачунарство) – Serbian" lang="sr" hreflang="sr" data-title="Октет (рачунарство)" data-language-autonym="Српски / srpski" data-language-local-name="Serbian" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Oktett_(datavetenskap)" title="Oktett (datavetenskap) – Swedish" lang="sv" hreflang="sv" data-title="Oktett (datavetenskap)" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Oktet_(bili%C5%9Fim)" title="Oktet (bilişim) – Turkish" lang="tr" hreflang="tr" data-title="Oktet (bilişim)" data-language-autonym="Türkçe" data-language-local-name="Turkish" 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%9E%D0%BA%D1%82%D0%B5%D1%82_(%D1%96%D0%BD%D1%84%D0%BE%D1%80%D0%BC%D0%B0%D1%82%D0%B8%D0%BA%D0%B0)" title="Октет (інформатика) – Ukrainian" lang="uk" hreflang="uk" data-title="Октет (інформатика)" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Octet_(%C4%91i%E1%BB%87n_to%C3%A1n)" title="Octet (điện toán) – Vietnamese" lang="vi" hreflang="vi" data-title="Octet (điện toán)" data-language-autonym="Tiếng Việt" data-language-local-name="Vietnamese" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E5%85%AB%E4%BD%8D%E5%85%83" title="八位元 – Chinese" lang="zh" hreflang="zh" data-title="八位元" data-language-autonym="中文" data-language-local-name="Chinese" 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 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searchaux" style="display:none">Unit of digital information</div> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">Not to be confused with <a href="/wiki/Units_of_information#Octlet" title="Units of information">Octlet</a>, <a href="/wiki/Octal" title="Octal">Octal</a>, or <a href="/wiki/Octave" title="Octave">Octave</a>.</div><style data-mw-deduplicate="TemplateStyles:r1251242444">.mw-parser-output .ambox{border:1px solid #a2a9b1;border-left:10px solid #36c;background-color:#fbfbfb;box-sizing:border-box}.mw-parser-output .ambox+link+.ambox,.mw-parser-output .ambox+link+style+.ambox,.mw-parser-output .ambox+link+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+style+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+link+.ambox{margin-top:-1px}html body.mediawiki .mw-parser-output .ambox.mbox-small-left{margin:4px 1em 4px 0;overflow:hidden;width:238px;border-collapse:collapse;font-size:88%;line-height:1.25em}.mw-parser-output .ambox-speedy{border-left:10px solid #b32424;background-color:#fee7e6}.mw-parser-output .ambox-delete{border-left:10px solid #b32424}.mw-parser-output .ambox-content{border-left:10px solid #f28500}.mw-parser-output .ambox-style{border-left:10px solid #fc3}.mw-parser-output .ambox-move{border-left:10px solid #9932cc}.mw-parser-output .ambox-protection{border-left:10px solid #a2a9b1}.mw-parser-output .ambox .mbox-text{border:none;padding:0.25em 0.5em;width:100%}.mw-parser-output .ambox .mbox-image{border:none;padding:2px 0 2px 0.5em;text-align:center}.mw-parser-output .ambox .mbox-imageright{border:none;padding:2px 0.5em 2px 0;text-align:center}.mw-parser-output .ambox .mbox-empty-cell{border:none;padding:0;width:1px}.mw-parser-output .ambox .mbox-image-div{width:52px}@media(min-width:720px){.mw-parser-output .ambox{margin:0 10%}}@media print{body.ns-0 .mw-parser-output .ambox{display:none!important}}</style><table class="box-More_citations_needed plainlinks metadata ambox ambox-content ambox-Refimprove" role="presentation"><tbody><tr><td class="mbox-image"><div class="mbox-image-div"><span typeof="mw:File"><a href="/wiki/File:Question_book-new.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/50px-Question_book-new.svg.png" decoding="async" width="50" height="39" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/75px-Question_book-new.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/100px-Question_book-new.svg.png 2x" data-file-width="512" data-file-height="399" /></a></span></div></td><td class="mbox-text"><div class="mbox-text-span">This article <b>needs additional citations for <a href="/wiki/Wikipedia:Verifiability" title="Wikipedia:Verifiability">verification</a></b>.<span class="hide-when-compact"> Please help <a href="/wiki/Special:EditPage/Octet_(computing)" title="Special:EditPage/Octet (computing)">improve this article</a> by <a href="/wiki/Help:Referencing_for_beginners" title="Help:Referencing for beginners">adding citations to reliable sources</a>. Unsourced material may be challenged and removed.<br /><small><span class="plainlinks"><i>Find sources:</i> <a rel="nofollow" class="external text" href="https://www.google.com/search?as_eq=wikipedia&q=%22Octet%22+computing">"Octet" computing</a> – <a rel="nofollow" class="external text" href="https://www.google.com/search?tbm=nws&q=%22Octet%22+computing+-wikipedia&tbs=ar:1">news</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?&q=%22Octet%22+computing&tbs=bkt:s&tbm=bks">newspapers</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?tbs=bks:1&q=%22Octet%22+computing+-wikipedia">books</a> <b>·</b> <a rel="nofollow" class="external text" href="https://scholar.google.com/scholar?q=%22Octet%22+computing">scholar</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.jstor.org/action/doBasicSearch?Query=%22Octet%22+computing&acc=on&wc=on">JSTOR</a></span></small></span> <span class="date-container"><i>(<span class="date">September 2008</span>)</i></span><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox ib-unit"><tbody><tr><th colspan="2" class="infobox-above">octet</th></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/System_of_units_of_measurement" title="System of units of measurement">Unit system</a></th><td class="infobox-data"><a href="/wiki/Units_of_information#Units_derived_from_bit" title="Units of information">units derived from bit</a></td></tr><tr><th scope="row" class="infobox-label">Unit of</th><td class="infobox-data">digital information, data size</td></tr><tr><th scope="row" class="infobox-label">Symbol</th><td class="infobox-data">o</td></tr><tr><th scope="row" class="infobox-label">In <a href="/wiki/Units_of_information#Primary_units" title="Units of information">primary units of information</a></th><td class="infobox-data">1 o = 8 <a href="/wiki/Bit" title="Bit">bits</a></td></tr></tbody></table><style data-mw-deduplicate="TemplateStyles:r1236303919">@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-has-images-with-white-backgrounds img{background:white}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-has-images-with-white-backgrounds img{background:white}}</style> <p>The <b>octet</b> is a <a href="/wiki/Units_of_information" title="Units of information">unit of digital information</a> in <a href="/wiki/Computing" title="Computing">computing</a> and <a href="/wiki/Telecommunication" class="mw-redirect" title="Telecommunication">telecommunications</a> that consists of eight <a href="/wiki/Bit" title="Bit">bits</a>. The term is often used when the term <i><a href="/wiki/Byte" title="Byte">byte</a></i> might be ambiguous, as the byte has historically been used for storage units of a variety of sizes. </p><p>The term <i>octad(e)</i> for eight bits is no longer common.<sup id="cite_ref-Philips_1971_1-0" class="reference"><a href="#cite_note-Philips_1971-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Williams_1969_2-0" class="reference"><a href="#cite_note-Williams_1969-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Definition">Definition</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Octet_(computing)&action=edit&section=1" title="Edit section: Definition"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The international standard <a href="/wiki/International_Electrotechnical_Commission" title="International Electrotechnical Commission">IEC</a> 60027-2, chapter 3.8.2, states that a byte is an octet of bits. However, the unit <a href="/wiki/Byte" title="Byte">byte</a> has historically been <a href="/wiki/Platform_(computing)" class="mw-redirect" title="Platform (computing)">platform</a>-dependent and has represented various storage sizes in the <a href="/wiki/History_of_computing" title="History of computing">history of computing</a>. Due to the influence of several major <a href="/wiki/Computer_architecture" title="Computer architecture">computer architectures</a> and product lines, the byte became overwhelmingly associated with eight bits. This meaning of <i>byte</i> is codified in such standards as <a href="/wiki/ISO/IEC_80000-13" class="mw-redirect" title="ISO/IEC 80000-13">ISO/IEC 80000-13</a>. While <i>byte</i> and <i>octet</i> are often used synonymously, those working with certain <a href="/wiki/Legacy_system" title="Legacy system">legacy systems</a> are careful to avoid ambiguity.<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (March 2017)">citation needed</span></a></i>]</sup> </p><p>Octets can be represented using number systems of varying bases such as the <a href="/wiki/Hexadecimal" title="Hexadecimal">hexadecimal</a>, <a href="/wiki/Decimal" title="Decimal">decimal</a>, or <a href="/wiki/Octal" title="Octal">octal</a> <a href="/wiki/Number_system" class="mw-redirect" title="Number system">number systems</a>. The binary value of all eight bits set (or activated) is <span class="nowrap"><span data-sort-value="7002255000000000000♠" style="display:none"></span>11111111<span style="vertical-align:sub; font-size:smaller; line-height:normal;">2</span></span>, equal to the hexadecimal value <span class="nowrap"><span data-sort-value="7002255000000000000♠" style="display:none"></span>FF<span style="vertical-align:sub; font-size:smaller; line-height:normal;">16</span></span>, the decimal value <span class="nowrap"><span data-sort-value="7002255000000000000♠" style="display:none"></span>255<span style="vertical-align:sub; font-size:smaller; line-height:normal;">10</span></span>, and the octal value <span class="nowrap"><span data-sort-value="7002255000000000000♠" style="display:none"></span>377<span style="vertical-align:sub; font-size:smaller; line-height:normal;">8</span></span>. One octet can be used to represent decimal values ranging from 0 to 255. </p><p>The term <i>octet</i> (symbol: o<sup id="cite_ref-NB_Postfix-o_3-0" class="reference"><a href="#cite_note-NB_Postfix-o-3"><span class="cite-bracket">[</span>nb 1<span class="cite-bracket">]</span></a></sup>) is often used when the use of <i>byte</i> might be ambiguous. It is frequently used in the <a href="/wiki/Request_for_Comments" title="Request for Comments">Request for Comments</a> (RFC) publications of the <a href="/wiki/Internet_Engineering_Task_Force" title="Internet Engineering Task Force">Internet Engineering Task Force</a> to describe storage sizes of <a href="/wiki/Communication_protocol" title="Communication protocol">network protocol</a> parameters. The earliest example is <style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><a href="/wiki/RFC_(identifier)" class="mw-redirect" title="RFC (identifier)">RFC</a> <a rel="nofollow" class="external text" href="https://datatracker.ietf.org/doc/html/rfc635">635</a> from 1974. In 2000, <a href="/wiki/Bob_Bemer" title="Bob Bemer">Bob Bemer</a> claimed to have earlier proposed the usage of the term octet for "8-bit bytes" when he headed software operations for <a href="/wiki/Cie._Bull" class="mw-redirect" title="Cie. Bull">Cie. Bull</a> in France in 1965 to 1966.<sup id="cite_ref-Bemer_2000_4-0" class="reference"><a href="#cite_note-Bemer_2000-4"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p><p>In <a href="/wiki/France" title="France">France</a>, <a href="/wiki/French_Canada" class="mw-redirect" title="French Canada">French Canada</a> and <a href="/wiki/Romania" title="Romania">Romania</a>, <i>octet</i> is used in common language instead of <i>byte</i> when the eight-bit sense is required; for example, a megabyte (MB) is termed a megaoctet (Mo). </p><p>A variable-length sequence of octets, as in <a href="/wiki/Abstract_Syntax_Notation_One" class="mw-redirect" title="Abstract Syntax Notation One">Abstract Syntax Notation One</a> (ASN.1), is referred to as an octet string. </p> <div class="mw-heading mw-heading3"><h3 id="Octad">Octad</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Octet_(computing)&action=edit&section=2" title="Edit section: Octad"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Historically, in <a href="/wiki/Western_Europe" title="Western Europe">Western Europe</a>, the term <i>octad</i> (or <i>octade</i>) was used to specifically denote eight bits,<sup id="cite_ref-Williams_1969_2-1" class="reference"><a href="#cite_note-Williams_1969-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Philips_1971_1-1" class="reference"><a href="#cite_note-Philips_1971-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> a usage no longer common. Early examples of usage exist in British,<sup id="cite_ref-Williams_1969_2-2" class="reference"><a href="#cite_note-Williams_1969-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> Dutch and German sources of the 1960s and 1970s, and throughout the documentation of <a href="/wiki/Philips" title="Philips">Philips</a> <a href="/wiki/Mainframe_computer" title="Mainframe computer">mainframe computers</a>.<sup id="cite_ref-Philips_1971_1-2" class="reference"><a href="#cite_note-Philips_1971-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> Similar terms are <i>triad</i> for a grouping of three bits and <i>decade</i> for ten bits. </p> <div class="mw-heading mw-heading2"><h2 id="Unit_multiples">Unit multiples</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Octet_(computing)&action=edit&section=3" title="Edit section: Unit multiples"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">See also: <a href="/wiki/Byte#Multiple-byte_units" title="Byte">Byte § Multiple-byte units</a></div> <p>Unit multiples of the octet may be formed with <a href="/wiki/SI_prefix" class="mw-redirect" title="SI prefix">SI prefixes</a> and <a href="/wiki/Binary_prefix" title="Binary prefix">binary prefixes</a> (power of 2 prefixes) as standardized by the <a href="/wiki/International_Electrotechnical_Commission" title="International Electrotechnical Commission">International Electrotechnical Commission</a> in 1998. </p> <table> <tbody><tr> <th colspan="3">SI prefixes </th></tr> <tr> <td>1 <i>kilooctet</i> (ko)</td> <td colspan="2">= 10<sup>3</sup> octets</td> <td>= <span style="white-space:nowrap">1<span style="margin-left:0.25em">000</span></span> octets </td></tr> <tr> <td>1 <i>megaoctet</i> (Mo)</td> <td>= 10<sup>6</sup> octets</td> <td>= 1000 ko</td> <td>= <span style="white-space:nowrap">1<span style="margin-left:0.25em">000</span><span style="margin-left:0.25em">000</span></span> octets </td></tr> <tr> <td>1 <i>gigaoctet</i> (Go)</td> <td>= 10<sup>9</sup> octets</td> <td>= 1000 Mo</td> <td>= <span style="white-space:nowrap">1<span style="margin-left:0.25em">000</span><span style="margin-left:0.25em">000</span><span style="margin-left:0.25em">000</span></span> octets </td></tr> <tr> <td>1 <i>teraoctet</i> (To)</td> <td>= 10<sup>12</sup> octets</td> <td>= 1000 Go</td> <td>= <span style="white-space:nowrap">1<span style="margin-left:0.25em">000</span><span style="margin-left:0.25em">000</span><span style="margin-left:0.25em">000</span><span style="margin-left:0.25em">000</span></span> octets </td></tr> <tr> <td>1 <i>petaoctet</i> (Po)</td> <td>= 10<sup>15</sup> octets</td> <td>= 1000 To</td> <td>= <span style="white-space:nowrap">1<span style="margin-left:0.25em">000</span><span style="margin-left:0.25em">000</span><span style="margin-left:0.25em">000</span><span style="margin-left:0.25em">000</span><span style="margin-left:0.25em">000</span></span> octets </td></tr> <tr> <td>1 <i>exaoctet</i> (Eo)</td> <td>= 10<sup>18</sup> octets</td> <td>= 1000 Po</td> <td>= <span style="white-space:nowrap">1<span style="margin-left:0.25em">000</span><span style="margin-left:0.25em">000</span><span style="margin-left:0.25em">000</span><span style="margin-left:0.25em">000</span><span style="margin-left:0.25em">000</span><span style="margin-left:0.25em">000</span></span> octets </td></tr> <tr> <td>1 <i>zettaoctet</i> (Zo)</td> <td>= 10<sup>21</sup> octets</td> <td>= 1000 Eo</td> <td>= <span style="white-space:nowrap">1<span style="margin-left:0.25em">000</span><span style="margin-left:0.25em">000</span><span style="margin-left:0.25em">000</span><span style="margin-left:0.25em">000</span><span style="margin-left:0.25em">000</span><span style="margin-left:0.25em">000</span><span style="margin-left:0.25em">000</span></span> octets </td></tr> <tr> <td>1 <i>yottaoctet</i> (Yo)</td> <td>= 10<sup>24</sup> octets</td> <td>= 1000 Zo</td> <td>= <span style="white-space:nowrap">1<span style="margin-left:0.25em">000</span><span style="margin-left:0.25em">000</span><span style="margin-left:0.25em">000</span><span style="margin-left:0.25em">000</span><span style="margin-left:0.25em">000</span><span style="margin-left:0.25em">000</span><span style="margin-left:0.25em">000</span><span style="margin-left:0.25em">000</span></span> octets </td></tr></tbody></table> <table> <tbody><tr> <th colspan="3">Binary prefixes </th></tr> <tr> <td>1 <i>kibioctet</i> (Kio, also written Ko, as distinct from ko)</td> <td colspan="2">= 2<sup>10</sup> octets</td> <td>= <span style="white-space:nowrap">1<span style="margin-left:0.25em">024</span></span> octets </td></tr> <tr> <td>1 <i>mebioctet</i> (Mio)</td> <td>= 2<sup>20</sup> octets</td> <td>= 1024 Kio</td> <td>= <span style="white-space:nowrap">1<span style="margin-left:0.25em">048</span><span style="margin-left:0.25em">576</span></span> octets </td></tr> <tr> <td>1 <i>gibioctet</i> (Gio)</td> <td>= 2<sup>30</sup> octets</td> <td>= 1024 Mio</td> <td>= <span style="white-space:nowrap">1<span style="margin-left:0.25em">073</span><span style="margin-left:0.25em">741</span><span style="margin-left:0.25em">824</span></span> octets </td></tr> <tr> <td>1 <i>tebioctet</i> (Tio)</td> <td>= 2<sup>40</sup> octets</td> <td>= 1024 Gio</td> <td>= <span style="white-space:nowrap">1<span style="margin-left:0.25em">099</span><span style="margin-left:0.25em">511</span><span style="margin-left:0.25em">627</span><span style="margin-left:0.25em">776</span></span> octets </td></tr> <tr> <td>1 <i>pebioctet</i> (Pio)</td> <td>= 2<sup>50</sup> octets</td> <td>= 1024 Tio</td> <td>= <span style="white-space:nowrap">1<span style="margin-left:0.25em">125</span><span style="margin-left:0.25em">899</span><span style="margin-left:0.25em">906</span><span style="margin-left:0.25em">842</span><span style="margin-left:0.25em">624</span></span> octets </td></tr> <tr> <td>1 <i>exbioctet</i> (Eio)</td> <td>= 2<sup>60</sup> octets</td> <td>= 1024 Pio</td> <td>= <span style="white-space:nowrap">1<span style="margin-left:0.25em">152</span><span style="margin-left:0.25em">921</span><span style="margin-left:0.25em">504</span><span style="margin-left:0.25em">606</span><span style="margin-left:0.25em">846</span><span style="margin-left:0.25em">976</span></span> octets </td></tr> <tr> <td>1 <i>zebioctet</i> (Zio)</td> <td>= 2<sup>70</sup> octets</td> <td>= 1024 Eio</td> <td>= <span style="white-space:nowrap">1<span style="margin-left:0.25em">180</span><span style="margin-left:0.25em">591</span><span style="margin-left:0.25em">620</span><span style="margin-left:0.25em">717</span><span style="margin-left:0.25em">411</span><span style="margin-left:0.25em">303</span><span style="margin-left:0.25em">424</span></span> octets </td></tr> <tr> <td>1 <i>yobioctet</i> (Yio)</td> <td>= 2<sup>80</sup> octets</td> <td>= 1024 Zio</td> <td>= <span style="white-space:nowrap">1<span style="margin-left:0.25em">208</span><span style="margin-left:0.25em">925</span><span style="margin-left:0.25em">819</span><span style="margin-left:0.25em">614</span><span style="margin-left:0.25em">629</span><span style="margin-left:0.25em">174</span><span style="margin-left:0.25em">706</span><span style="margin-left:0.25em">176</span></span> octets </td></tr></tbody></table> <div class="mw-heading mw-heading2"><h2 id="Use_in_Internet_Protocol_addresses">Use in Internet Protocol addresses</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Octet_(computing)&action=edit&section=4" title="Edit section: Use in Internet Protocol addresses"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The octet is used in representations of <a href="/wiki/Internet_Protocol" title="Internet Protocol">Internet Protocol</a> <a href="/wiki/Computer_network" title="Computer network">computer network</a> addresses.<sup id="cite_ref-TCPIP_5-0" class="reference"><a href="#cite_note-TCPIP-5"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> An <a href="/wiki/IPv4" title="IPv4">IPv4</a> address consists of four octets, usually displayed individually as a series of decimal values ranging from 0 to 255, each separated by a full stop (dot). Using octets with all eight bits set, the representation of the highest-numbered IPv4 address is <i><span class="ipaddr"><span style="padding-right: 1px;">255.255.255.255</span></span></i>. </p><p>An <a href="/wiki/IPv6_address" title="IPv6 address">IPv6 address</a> consists of sixteen octets, displayed in hexadecimal representation (two <a href="https://en.wiktionary.org/wiki/hexit" class="extiw" title="wikt:hexit">hexits</a> per octet), using a colon character (:) after each pair of octets (16 bits are also known as <a href="/wiki/Hextet" title="Hextet">hextet</a>) for readability, such as <i><span class="ipaddr"><span style="padding-right: 1px;">2001:0db8:0000:0000:0123:4567:89ab:cdef</span></span></i>.<sup id="cite_ref-rfc4291_6-0" class="reference"><a href="#cite_note-rfc4291-6"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Octet_(computing)&action=edit&section=5" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Variable-width_encoding" title="Variable-width encoding">Variable-width encoding</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Notes">Notes</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Octet_(computing)&action=edit&section=6" title="Edit section: Notes"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-NB_Postfix-o-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-NB_Postfix-o_3-0">^</a></b></span> <span class="reference-text">However, the <a href="/wiki/IEC_80000-13" class="mw-redirect" title="IEC 80000-13">IEC 80000-13</a> symbol "o" for octets can be confused with the postfix "o" to indicate <a href="/wiki/Octal_number" class="mw-redirect" title="Octal number">octal numbers</a> in <i><a href="/wiki/Intel_convention" class="mw-redirect" title="Intel convention">Intel convention</a></i>.</span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Octet_(computing)&action=edit&section=7" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239543626"><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-Philips_1971-1"><span class="mw-cite-backlink">^ <a href="#cite_ref-Philips_1971_1-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Philips_1971_1-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-Philips_1971_1-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20160304072023/http://www.intact-reunies.nl/pdf/product1971.pdf">"Philips - Philips Data Systems' product range - April 1971"</a> <span class="cs1-format">(PDF)</span>. <a href="/wiki/Philips" title="Philips">Philips</a>. 1971. Archived from <a rel="nofollow" class="external text" href="http://www.intact-reunies.nl/pdf/product1971.pdf">the original</a> <span class="cs1-format">(PDF)</span> on 2016-03-04<span class="reference-accessdate">. Retrieved <span class="nowrap">2016-10-03</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Philips+-+Philips+Data+Systems%27+product+range+-+April+1971&rft.pub=Philips&rft.date=1971&rft_id=http%3A%2F%2Fwww.intact-reunies.nl%2Fpdf%2Fproduct1971.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOctet+%28computing%29" class="Z3988"></span></span> </li> <li id="cite_note-Williams_1969-2"><span class="mw-cite-backlink">^ <a href="#cite_ref-Williams_1969_2-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Williams_1969_2-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-Williams_1969_2-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFWilliams1969" class="citation book cs1">Williams, R. H. (1969-01-01). <i>British Commercial Computer Digest: Pergamon Computer Data Series</i>. <a href="/wiki/Pergamon_Press" title="Pergamon Press">Pergamon Press</a>. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/1483122107" title="Special:BookSources/1483122107"><bdi>1483122107</bdi></a>. 978-1483122106.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=British+Commercial+Computer+Digest%3A+Pergamon+Computer+Data+Series&rft.pub=Pergamon+Press&rft.date=1969-01-01&rft.isbn=1483122107&rft.aulast=Williams&rft.aufirst=R.+H.&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOctet+%28computing%29" class="Z3988"></span></span> </li> <li id="cite_note-Bemer_2000-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-Bemer_2000_4-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFBemer2000" class="citation web cs1"><a href="/wiki/Robert_William_Bemer" class="mw-redirect" title="Robert William Bemer">Bemer, Robert William</a> (2000-08-08). <a rel="nofollow" class="external text" href="https://web.archive.org/web/20170403130829/http://www.bobbemer.com/BYTE.HTM">"Why is a byte 8 bits? Or is it?"</a>. <i>Computer History Vignettes</i>. Archived from <a rel="nofollow" class="external text" href="http://www.bobbemer.com/BYTE.HTM">the original</a> on 2017-04-03<span class="reference-accessdate">. Retrieved <span class="nowrap">2017-05-15</span></span>. <q>[…] I came to work for <a href="/wiki/IBM" title="IBM">IBM</a>, and saw all the confusion caused by the 64-character limitation. Especially when we started to think about word processing, which would require both upper and lower case. […] I even made a proposal (in view of <a href="/wiki/IBM_Stretch" class="mw-redirect" title="IBM Stretch">STRETCH</a>, the very first computer I know of with an 8-bit byte) that would extend the number of <a href="/wiki/Punch_card" class="mw-redirect" title="Punch card">punch card</a> character codes to 256 […]. So some folks started thinking about 7-bit characters, but this was ridiculous. With IBM's STRETCH computer as background, handling 64-character words divisible into groups of 8 (I designed the character set for it, under the guidance of Dr. <a href="/wiki/Werner_Buchholz" title="Werner Buchholz">Werner Buchholz</a>, the man who DID coin the term "<a href="/wiki/Byte" title="Byte">byte</a>" for an 8-bit grouping). […] It seemed reasonable to make a universal 8-bit character set, handling up to 256. In those days my mantra was "powers of 2 are magic". And so the group I headed developed and justified such a proposal […] The <a href="/wiki/IBM_System_360" class="mw-redirect" title="IBM System 360">IBM 360</a> used 8-bit characters, although not ASCII directly. Thus Buchholz's "byte" caught on everywhere. I myself did not like the name for many reasons. The design had 8 bits moving around in parallel. But then came a new IBM part, with 9 bits for self-checking, both inside the CPU and in the <a href="/wiki/Tape_drive" title="Tape drive">tape drives</a>. I exposed this 9-bit byte to the press in 1973. But long before that, when I headed software operations for <a href="/wiki/Cie._Bull" class="mw-redirect" title="Cie. Bull">Cie. Bull</a> in France in 1965-66, I insisted that "byte" be deprecated in favor of "octet". […]</q></cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Computer+History+Vignettes&rft.atitle=Why+is+a+byte+8+bits%3F+Or+is+it%3F&rft.date=2000-08-08&rft.aulast=Bemer&rft.aufirst=Robert+William&rft_id=http%3A%2F%2Fwww.bobbemer.com%2FBYTE.HTM&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOctet+%28computing%29" class="Z3988"></span></span> </li> <li id="cite_note-TCPIP-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-TCPIP_5-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFKozierok2005" class="citation web cs1">Kozierok, Charles M. (2005-09-20) [2001]. <a rel="nofollow" class="external text" href="http://www.tcpipguide.com/free/t_BinaryInformationandRepresentationBitsBytesNibbles-3.htm">"The TCP/IP Guide - Binary Information and Representation: Bits, Bytes, Nibbles, Octets and Characters - Byte versus Octet"</a>. 3.0. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20170403122042/http://www.tcpipguide.com/free/t_BinaryInformationandRepresentationBitsBytesNibbles-3.htm">Archived</a> from the original on 2017-04-03<span class="reference-accessdate">. Retrieved <span class="nowrap">2017-04-03</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=The+TCP%2FIP+Guide+-+Binary+Information+and+Representation%3A+Bits%2C+Bytes%2C+Nibbles%2C+Octets+and+Characters+-+Byte+versus+Octet&rft.series=3.0&rft.date=2005-09-20&rft.aulast=Kozierok&rft.aufirst=Charles+M.&rft_id=http%3A%2F%2Fwww.tcpipguide.com%2Ffree%2Ft_BinaryInformationandRepresentationBitsBytesNibbles-3.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOctet+%28computing%29" class="Z3988"></span></span> </li> <li id="cite_note-rfc4291-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-rfc4291_6-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFR._HindenS._Deering2006" class="citation cs1">R. Hinden; <a href="/wiki/Steve_Deering" title="Steve Deering">S. Deering</a> (February 2006). <a rel="nofollow" class="external text" href="https://datatracker.ietf.org/doc/html/rfc4291"><i>IP Version 6 Addressing Architecture</i></a>. Network Working Group. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://doi.org/10.17487%2FRFC4291">10.17487/RFC4291</a></span>. <a href="/wiki/Request_for_Comments" title="Request for Comments">RFC</a> <a rel="nofollow" class="external text" href="https://datatracker.ietf.org/doc/html/rfc4291">4291</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=IP+Version+6+Addressing+Architecture&rft.pub=Network+Working+Group&rft.date=2006-02&rft_id=info%3Adoi%2F10.17487%2FRFC4291&rft.au=R.+Hinden&rft.au=S.+Deering&rft_id=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fhtml%2Frfc4291&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOctet+%28computing%29" class="Z3988"></span> <i>Draft Standard.</i> Obsoletes <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222">RFC <a rel="nofollow" class="external text" href="https://datatracker.ietf.org/doc/html/rfc3513">3513</a>. Updated by <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222">RFC <a rel="nofollow" class="external text" href="https://datatracker.ietf.org/doc/html/rfc5952">5952</a>, <a rel="nofollow" class="external text" href="https://datatracker.ietf.org/doc/html/rfc6052">6052</a>, <a rel="nofollow" class="external text" href="https://datatracker.ietf.org/doc/html/rfc7136">7136</a>, <a rel="nofollow" class="external text" href="https://datatracker.ietf.org/doc/html/rfc7346">7346</a>, <a rel="nofollow" class="external text" href="https://datatracker.ietf.org/doc/html/rfc7371">7371</a> and <a rel="nofollow" class="external text" href="https://datatracker.ietf.org/doc/html/rfc8064">8064</a>. </span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Octet_(computing)&action=edit&section=8" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><span class="noviewer" typeof="mw:File"><a href="/wiki/File:Wiktionary-logo-en-v2.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/9/99/Wiktionary-logo-en-v2.svg/16px-Wiktionary-logo-en-v2.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/99/Wiktionary-logo-en-v2.svg/24px-Wiktionary-logo-en-v2.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/99/Wiktionary-logo-en-v2.svg/32px-Wiktionary-logo-en-v2.svg.png 2x" data-file-width="512" data-file-height="512" /></a></span> The dictionary definition of <a href="https://en.wiktionary.org/wiki/octet" class="extiw" title="wiktionary:octet"><i>octet</i></a> at Wiktionary</li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist 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