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Virtual Local Area Network (VLAN)


A VLAN is a type of local area network that does not have its own dedicated physical infrastructure, but instead uses another local area network to carry its traffic. The traffic is encapsulated so that a number of logically separate VLANs can be carried by the same physical LAN.

VLANs differ from other types of network tunnel in that they are are both carried by layer 2 (switched) networks and behave as layer 2 networks. Each VLAN acts as a separate broadcast domain. An example of a common VLAN protocol is IEEE 802.1Q.


See also