https://readonlywiki.luccapirovano.com/index.php?action=history&feed=atom&title=802.1q 2026-06-16T01:35:38Z Revision history for this page on the wiki MediaWiki 1.43.3 https://readonlywiki.luccapirovano.com/index.php?title=802.1q&diff=1017&oldid=prev 2026-01-09T01:40:16Z

<p><span class="autocomment">See also</span></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 01:40, 9 January 2026</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l21">Line 21:</td> <td colspan="2" class="diff-lineno">Line 21:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* Improve network security</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* Improve network security</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* Support scalable network design</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* Support scalable network design</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;"></del></div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">== See also ==</del></div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">* [[Virtual LAN]]</del></div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">* [[IEEE 802.1D]]</del></div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">* [[Quality of Service]]</del></div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== References ==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== References ==</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* IEEE Standard 802.1Q</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* IEEE Standard 802.1Q</div></td></tr> <!-- diff cache key my_wiki:diff:1.41:old-1015:rev-1017:php=table --> </table>

209.87.206.13 https://readonlywiki.luccapirovano.com/index.php?title=802.1q&diff=1015&oldid=prev 2026-01-09T01:39:09Z

<p>Created page with &quot;= IEEE 802.1Q = &#039;&#039;&#039;IEEE 802.1Q&#039;&#039;&#039; is a networking standard that defines &#039;&#039;&#039;Virtual LAN (VLAN) tagging&#039;&#039;&#039; on Ethernet networks. It allows multiple VLANs to be carried over a single physical link, a process known as &#039;&#039;&#039;VLAN trunking&#039;&#039;&#039;. == Overview == 802.1Q works by inserting a 4-byte tag into an Ethernet frame. This tag identifies the VLAN to which the frame belongs, enabling network switches to separate traffic logically while sharing the same physical infrastructure....&quot;</p> <p><b>New page</b></p><div>= IEEE 802.1Q =<br /> <br /> &#039;&#039;&#039;IEEE 802.1Q&#039;&#039;&#039; is a networking standard that defines &#039;&#039;&#039;Virtual LAN (VLAN) tagging&#039;&#039;&#039; on Ethernet networks. It allows multiple VLANs to be carried over a single physical link, a process known as &#039;&#039;&#039;VLAN trunking&#039;&#039;&#039;.<br /> <br /> == Overview ==<br /> 802.1Q works by inserting a 4-byte tag into an Ethernet frame. This tag identifies the VLAN to which the frame belongs, enabling network switches to separate traffic logically while sharing the same physical infrastructure.<br /> <br /> == Frame Format ==<br /> The 802.1Q tag includes:<br /> * &#039;&#039;&#039;Tag Protocol Identifier (TPID)&#039;&#039;&#039; – Identifies the frame as VLAN-tagged<br /> * &#039;&#039;&#039;Priority Code Point (PCP)&#039;&#039;&#039; – Used for Quality of Service (QoS)<br /> * &#039;&#039;&#039;Drop Eligible Indicator (DEI)&#039;&#039;&#039; – Indicates congestion eligibility<br /> * &#039;&#039;&#039;VLAN ID (VID)&#039;&#039;&#039; – Identifies the VLAN (range 1–4094)<br /> <br /> == Native VLAN ==<br /> Frames belonging to the &#039;&#039;&#039;native VLAN&#039;&#039;&#039; are sent untagged on 802.1Q trunk links by default. This behavior can be configured and is often changed for security reasons.<br /> <br /> == Uses ==<br /> 802.1Q is commonly used in enterprise and data center networks to:<br /> * Segment broadcast domains<br /> * Improve network security<br /> * Support scalable network design<br /> <br /> == See also ==<br /> * [[Virtual LAN]]<br /> * [[IEEE 802.1D]]<br /> * [[Quality of Service]]<br /> <br /> == References ==<br /> * IEEE Standard 802.1Q</div>

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