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What is use of VLAN Tagging?

April 26, 2017tagging VLAN

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What is use of VLAN Tagging?

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• LAN is defined as a single broadcast domain with Standard (IEEE 802.1Q). • VLAN is Virtual LAN. • If a user broadcasts information on his/ her LAN, the broadcast will be received by every other user on the LAN. • VLANs allow to logically segmenting a LAN into different broadcast domains. • In order to extend VLANs across different switches, a link called ‘trunk’ must interconnect the switches. • Now, when you want traffic from multiple VLANs to be able to cross a link that interconnects two switches, there is a need to configure a VLAN tagging method on the ports that supply the link. • A frame is tagged when it leaves the switch with information about the “VLAN Id” that the frame belongs to.