Virtual LANs

A Virtual LAN (VLAN) is a group of devices that share the same broadcast domain within a switched network. Broadcast domains describe the extent to which a network propagates a broadcast frame generated by a device.

Some switches can be configured to support single or multiple VLANs. When a switch supports multiple VLANs, the broadcast domains are not shared between the VLANs.

Notes

>>	The device learns the Layer 2 addresses on every VLAN port.

>>	Known unicast frames are forwarded to the relevant port.

>>	Unknown unicast frames and broadcast frames are forwarded to all ports.