VLANs reduce security risks by reducing the number of hosts that receive copies of frames that the switches flood.VLANs increase the number of broadcast domains while decreasing their size.Here are the main reasons why VLANs are used: This means that frames broadcasted onto the network will be switched only between the ports within the same VLAN.Ī VLAN acts like a physical LAN, but it allows hosts to be grouped together in the same broadcast domain even if they are not connected to the same switch. VLANs can spread across multiple switches, with each VLAN being treated as its own subnet or broadcast domain. Each VLAN acts as a subgroup of the switch ports in an Ethernet LAN. ![]() VLANs are usually configured on switches by placing some interfaces into one broadcast domain and some interfaces into another. VLANs (Virtual LANs) are logical grouping of devices in the same broadcast domain.
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