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class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Level of performance in engineering and information technology</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/Best_practice" title="Best practice">Best practice</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/Best_current_practice" title="Special:EditPage/Best current practice">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=%22Best+current+practice%22">"Best current practice"</a> – <a rel="nofollow" class="external text" href="https://www.google.com/search?tbm=nws&q=%22Best+current+practice%22+-wikipedia&tbs=ar:1">news</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?&q=%22Best+current+practice%22&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=%22Best+current+practice%22+-wikipedia">books</a> <b>·</b> <a rel="nofollow" class="external text" href="https://scholar.google.com/scholar?q=%22Best+current+practice%22">scholar</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.jstor.org/action/doBasicSearch?Query=%22Best+current+practice%22&acc=on&wc=on">JSTOR</a></span></small></span> <span class="date-container"><i>(<span class="date">September 2011</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> <p> A <b>best current practice</b>, abbreviated as <b>BCP</b>,<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> is a <i>de facto</i> level of performance in engineering and information technology. It is more flexible than a <a href="/wiki/Technical_standard" title="Technical standard">standard</a>, since techniques and tools are continually evolving. The <a href="/wiki/Internet_Engineering_Task_Force" title="Internet Engineering Task Force">Internet Engineering Task Force</a> publishes Best Current Practice documents in a numbered document series. Each document in this series is paired with the currently valid <a href="/wiki/Request_for_Comments" title="Request for Comments">Request for Comments</a> (RFC) document. BCP was introduced in RFC-1818.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p><p>BCPs are document guidelines, processes, methods, and other matters not suitable for standardization. The <a href="/wiki/Internet_standard#Standardization_process" class="mw-redirect" title="Internet standard">Internet standards process</a> itself is defined in a series of BCPs, as is the formal organizational structure of the IETF, <a href="/wiki/Internet_Engineering_Steering_Group" class="mw-redirect" title="Internet Engineering Steering Group">Internet Engineering Steering Group</a>, <a href="/wiki/Internet_Architecture_Board" title="Internet Architecture Board">Internet Architecture Board</a>, and other groups involved in that process. IETF's separate <a href="/wiki/Internet_Standard" title="Internet Standard">Standard Track</a> (STD) document series defines the fully standardized network protocols of the Internet, such as the <a href="/wiki/Internet_Protocol" title="Internet Protocol">Internet Protocol</a>, the <a href="/wiki/Transmission_Control_Protocol" title="Transmission Control Protocol">Transmission Control Protocol</a>, and the <a href="/wiki/Domain_Name_System" title="Domain Name System">Domain Name System</a>. </p><p>Each RFC number refers to a specific version of a document Standard Track, but the BCP number refers to the most recent revision of the document. Thus, citations often reference both the BCP number and the RFC number. Example citations for BCPs are: <a href="/wiki/BCP_38" class="mw-redirect" title="BCP 38">BCP 38</a>, <a href="/wiki/RFC_2827" class="mw-redirect" title="RFC 2827">RFC 2827</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Significant_fields_of_application">Significant fields of application</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Best_current_practice&action=edit&section=1" title="Edit section: Significant fields of application"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="BCP_related_to_IPv6">BCP related to IPv6</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Best_current_practice&action=edit&section=2" title="Edit section: BCP related to IPv6"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <table class="wikitable sortable" border="1"> <tbody><tr> <th>BCP number</th> <th>Title </th></tr> <tr> <td><a rel="nofollow" class="external text" href="https://tools.ietf.org/html/bcp157">BCP157</a></td> <td style="width:400px">IPv6 Address Assignment to End Sites </td></tr> <tr> <td><a rel="nofollow" class="external text" href="https://tools.ietf.org/html/bcp177">BCP177</a></td> <td style="width:400px">IPv6 Support Required for All IP-Capable Nodes </td></tr> <tr> <td><a rel="nofollow" class="external text" href="https://tools.ietf.org/html/bcp198">BCP198</a></td> <td style="width:400px">IPv6 Prefix Length Recommendation for Forwarding </td></tr> </tbody></table> <div class="mw-heading mw-heading3"><h3 id="BCP_related_to_DNS">BCP related to DNS</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Best_current_practice&action=edit&section=3" title="Edit section: BCP related to DNS"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <table class="wikitable sortable" border="1"> <tbody><tr> <th>BCP number</th> <th>Title </th></tr> <tr> <td><a rel="nofollow" class="external text" href="https://tools.ietf.org/html/bcp16">BCP016</a></td> <td style="width:400px">Selection and Operation of Secondary DNS Servers </td></tr> <tr> <td><a rel="nofollow" class="external text" href="https://tools.ietf.org/html/bcp17">BCP017</a></td> <td style="width:400px">Use of DNS Aliases for Network Services </td></tr> <tr> <td><a rel="nofollow" class="external text" href="https://tools.ietf.org/html/bcp20">BCP020</a></td> <td style="width:400px">Classless IN-ADDR.ARPA delegation </td></tr> <tr> <td><a rel="nofollow" class="external text" href="https://tools.ietf.org/html/bcp32">BCP032</a></td> <td style="width:400px">Reserved Top Level DNS Names </td></tr> <tr> <td><a rel="nofollow" class="external text" href="https://tools.ietf.org/html/bcp42">BCP042</a></td> <td style="width:400px">Domain Name System (DNS) IANA Considerations </td></tr> <tr> <td><a rel="nofollow" class="external text" href="https://tools.ietf.org/html/bcp49">BCP049</a></td> <td style="width:400px">Delegation of IP6.ARPA </td></tr> <tr> <td><a rel="nofollow" class="external text" href="https://tools.ietf.org/html/bcp52">BCP052</a></td> <td style="width:400px">Management Guidelines & Operational Requirements for the Address and Routing Parameter Area Domain ("arpa") </td></tr> <tr> <td><a rel="nofollow" class="external text" href="https://tools.ietf.org/html/bcp65">BCP065</a></td> <td style="width:400px">Dynamic Delegation Discovery System (DDDS) Part Five: URI.ARPA Assignment Procedures </td></tr> <tr> <td><a rel="nofollow" class="external text" href="https://tools.ietf.org/html/bcp80">BCP080</a></td> <td style="width:400px">Delegation of E.F.F.3.IP6.ARPA </td></tr> <tr> <td><a rel="nofollow" class="external text" href="https://tools.ietf.org/html/bcp91">BCP091</a></td> <td style="width:400px">DNS IPv6 Transport Operational Guidelines </td></tr> <tr> <td><a rel="nofollow" class="external text" href="https://tools.ietf.org/html/bcp109">BCP109</a></td> <td style="width:400px">Deprecation of "ip6.int" </td></tr> <tr> <td><a rel="nofollow" class="external text" href="https://tools.ietf.org/html/bcp123">BCP123</a></td> <td style="width:400px">Observed DNS Resolution Misbehavior </td></tr> <tr> <td><a rel="nofollow" class="external text" href="https://tools.ietf.org/html/bcp152">BCP152</a></td> <td style="width:400px">DNS Proxy Implementation Guidelines </td></tr> <tr> <td><a rel="nofollow" class="external text" href="https://tools.ietf.org/html/bcp155">BCP155</a></td> <td style="width:400px">Nameservers for IPv4 and IPv6 Reverse Zones </td></tr> <tr> <td><a rel="nofollow" class="external text" href="https://tools.ietf.org/html/bcp163">BCP163</a></td> <td style="width:400px">Locally Served DNS Zones </td></tr> </tbody></table> <div class="mw-heading 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style="width:400px">Recommended Internet Service Provider Security Services and Procedures </td></tr> <tr> <td><a rel="nofollow" class="external text" href="https://tools.ietf.org/html/bcp61">BCP061</a></td> <td style="width:400px">Strong Security Requirements for Internet Engineering Task Force Standard Protocols </td></tr> <tr> <td><a rel="nofollow" class="external text" href="https://tools.ietf.org/html/bcp72">BCP072</a></td> <td style="width:400px">Guidelines for Writing RFC Text on Security Considerations </td></tr> <tr> <td><a rel="nofollow" class="external text" href="https://tools.ietf.org/html/bcp106">BCP106</a></td> <td style="width:400px">Randomness Requirements for Security </td></tr> <tr> <td><a rel="nofollow" class="external text" href="https://tools.ietf.org/html/bcp136">BCP136</a></td> <td style="width:400px">Secure Connectivity and Mobility Using Mobile IPv4 and IKEv2 Mobility and Multihoming (MOBIKE) </td></tr> <tr> <td><a rel="nofollow" class="external text" href="https://tools.ietf.org/html/bcp140">BCP140</a></td> <td style="width:400px">Preventing Use of Recursive Nameservers in Reflector Attacks </td></tr> <tr> <td><a rel="nofollow" class="external text" href="https://tools.ietf.org/html/bcp188">BCP188</a></td> <td style="width:400px">Pervasive Monitoring Is an Attack </td></tr> <tr> <td><a rel="nofollow" class="external text" href="https://tools.ietf.org/html/bcp194">BCP194</a></td> <td style="width:400px">BGP Operations and Security </td></tr> <tr> <td><a rel="nofollow" class="external text" href="https://tools.ietf.org/html/bcp195">BCP195</a></td> <td style="width:400px">Recommendations for Secure Use of Transport Layer Security (TLS) and Datagram Transport Layer Security (DTLS) </td></tr> <tr> <td><a rel="nofollow" class="external text" href="https://tools.ietf.org/html/bcp199">BCP199</a></td> <td style="width:400px">DHCPv6-Shield: Protecting against Rogue DHCPv6 Servers </td></tr> </tbody></table> <div class="mw-heading mw-heading3"><h3 id="BCP_related_to_globalization">BCP related to globalization</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Best_current_practice&action=edit&section=5" title="Edit section: BCP related to globalization"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <table class="wikitable sortable" border="1"> <tbody><tr> <th>BCP number</th> <th>Title </th></tr> <tr> <td><a rel="nofollow" class="external text" href="https://tools.ietf.org/html/bcp47">BCP047</a></td> <td style="width:400px">Tags for Identifying Languages (<a href="/wiki/IETF_language_tag" title="IETF language tag">IETF language tag</a>) </td></tr> </tbody></table> <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=Best_current_practice&action=edit&section=6" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Benchmarking" title="Benchmarking">Benchmarking</a></li> <li><a href="/wiki/Best_practice" title="Best practice">Best practice</a></li> <li><a href="/wiki/Gold_standard_(test)" title="Gold standard (test)">Gold standard (test)</a></li> <li><a href="/wiki/Prior_art" title="Prior art">Prior art</a></li></ul> <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=Best_current_practice&action=edit&section=7" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><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 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(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite id="CITEREFLiPostelRekhter1995" class="citation web cs1">Li, Tony; Postel, Jon; Rekhter, Yakov (August 1995). <a rel="nofollow" class="external text" href="https://tools.ietf.org/html/rfc1818">"Best Current Practices"</a>. ietf.org<span class="reference-accessdate">. Retrieved <span class="nowrap">13 September</span> 2015</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Best+Current+Practices&rft.pub=ietf.org&rft.date=1995-08&rft.aulast=Li&rft.aufirst=Tony&rft.au=Postel%2C+Jon&rft.au=Rekhter%2C+Yakov&rft_id=https%3A%2F%2Ftools.ietf.org%2Fhtml%2Frfc1818&rfr_id=info%3Asid%2Fen.wikipedia.org%3ABest+current+practice" class="Z3988"></span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text">rfc:1818</span> </li> </ol></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=Best_current_practice&action=edit&section=8" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="https://tools.ietf.org/rfc/bcp/bcp-index.txt">IETF's BCP Index</a></li></ul>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=1x1&usesul3=0" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Best_current_practice&oldid=1238530922">https://en.wikipedia.org/w/index.php?title=Best_current_practice&oldid=1238530922</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Categories</a>: <ul><li><a href="/wiki/Category:Organizational_performance_management" title="Category:Organizational performance management">Organizational performance management</a></li><li><a href="/wiki/Category:Standards" title="Category:Standards">Standards</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Hidden categories: <ul><li><a href="/wiki/Category:Articles_with_short_description" title="Category:Articles with short description">Articles with short description</a></li><li><a href="/wiki/Category:Short_description_is_different_from_Wikidata" title="Category:Short description is different from Wikidata">Short description is different from Wikidata</a></li><li><a href="/wiki/Category:Articles_needing_additional_references_from_September_2011" title="Category:Articles needing additional references from September 2011">Articles needing additional references from September 2011</a></li><li><a href="/wiki/Category:All_articles_needing_additional_references" title="Category:All articles needing additional references">All articles needing additional references</a></li><li><a href="/wiki/Category:Use_dmy_dates_from_May_2024" title="Category:Use dmy dates from May 2024">Use dmy dates from May 2024</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> This page was last edited on 4 August 2024, at 11:03<span class="anonymous-show"> (UTC)</span>.</li> <li id="footer-info-copyright">Text is available under the <a href="/wiki/Wikipedia:Text_of_the_Creative_Commons_Attribution-ShareAlike_4.0_International_License" title="Wikipedia:Text of the Creative Commons Attribution-ShareAlike 4.0 International License">Creative Commons Attribution-ShareAlike 4.0 License</a>; additional terms may apply. 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