Allied Telesis AT-8550 - Manual (Page 68)

Overview of Virtual LANs
4-2
❑ VLANs provide extra security.
Devices within each VLAN can only communicate with member
devices in the same VLAN. If a device in VLAN Marketing must
communicate with devices in VLAN Sales, the traffic must cross a
routing device.
❑ VLANs ease the change and movement of devices.
With traditional networks, network administrators spend much of
their time dealing with moves and changes. If users move to a
different subnetwork, the addresses of each endstation must be
updated manually.
For example, with a VLAN, if an endstation in VLAN Marketing is
moved to a port in another part of the network, and retains its
original subnet membership; you must only specify that the new
port is in VLAN Marketing.