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<span id="openzim-page-title" class="mw-page-title-main"><span class="mw-page-title-main">Data Link Control</span></span>
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<div id="mw-content-text" class="mw-body-content mw-content-ltr" lang="en" dir="ltr"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><p>In the <a href="OSI_model" title="OSI model">OSI</a> <a href="Computer_network" title="Computer network">networking</a> model, <b>Data Link Control</b> (<b>DLC</b>) is the service provided by the <a href="Data_link_layer" title="Data link layer">data link layer</a>. <a href="Network_interface_card" class="mw-redirect" title="Network interface card">Network interface cards</a> have a DLC address that identifies each card; for instance, <a href="Ethernet" title="Ethernet">Ethernet</a> and other types of cards have a 48-bit <a href="MAC_address" title="MAC address">MAC address</a> built into the cards' <a href="Firmware" title="Firmware">firmware</a> when they are manufactured.
</p><p>There is also a <a href="Transport_layer" title="Transport layer">network transport protocol</a> with the name Data Link Control, comparable to better-known protocols like <a href="TCP/IP" class="mw-redirect" title="TCP/IP">TCP/IP</a> and <a href="AppleTalk" title="AppleTalk">AppleTalk</a>. DLC is a transport protocol used by <a href="IBM" title="IBM">IBM</a> <a href="Systems_Network_Architecture" title="Systems Network Architecture">SNA</a> <a href="Mainframe_computer" title="Mainframe computer">mainframe</a> computers and peripherals and compatible equipment. In computer networking, it is typically used for communications between network-attached printers, workstations and servers, for example by <a href="Hewlett-Packard" title="Hewlett-Packard">HP</a> in their <a href="JetDirect" title="JetDirect">JetDirect</a> <a href="Print_server" title="Print server">print servers</a>. While it was widely used up until the time of <a href="Windows_2000" title="Windows 2000">Windows 2000</a>, versions from <a href="Windows_XP" title="Windows XP">Windows XP</a> onward do not include support for DLC.<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>
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<div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2></div>
<ul><li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20210615041045/http://publib16.boulder.ibm.com/doc_link/en_US/a_doc_lib/aixprggd/progcomc/dlc_ovw.htm">Generic DLC Environment Overview</a> at the <a href="Wayback_Machine" title="Wayback Machine">Wayback Machine</a> (archived 2021-06-15)</li>
<li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20080506183006/http://www.microsoft.com/technet/prodtechnol/windows2000serv/reskit/prork/prcj_ibm_wcro.mspx?mfr=true">Microsoft DLC protocol in Windows 2000</a> at the <a href="Wayback_Machine" title="Wayback Machine">Wayback Machine</a> (archived 2008-05-06)</li>
<li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20170826121803/https://technet.microsoft.com/de-de/library/ee266489.aspx">Microsoft TechNet: The Data Link Control Interface</a> at the <a href="Wayback_Machine" title="Wayback Machine">Wayback Machine</a> (archived 2017-08-26), 30.3.2013</li></ul>
<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>
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</style><cite id="CITEREFMicrosoft2002" class="citation web cs1">Microsoft (October 11, 2002). <a rel="nofollow" class="external text" href="https://web.archive.org/web/20050910072152/http://support.microsoft.com/kb/306037">"The DLC Protocol Is Not Available in Windows XP"</a>. <i>Microsoft Support</i>. Archived from <a rel="nofollow" class="external text" href="http://support.microsoft.com/kb/306037">the original</a> on 2005-09-10<span class="reference-accessdate">. Retrieved <span class="nowrap">November 8,</span> 2012</span>.</cite></span>
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