Interlogix NS3500-28T-4S User Manual - Manual (Page 109)

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4.5 VLAN
4.5.1 VLAN Overview
A Virtual Local Area Network (VLAN) is a network topology configured according to a logical scheme rather than the
physical layout. VLAN can be used to combine any collection of LAN segments into an autonomous user group that
appears as a single LAN. VLAN also logically segment the network into different broadcast domains so that packets
are forwarded only between ports within the VLAN. Typically, a VLAN corresponds to a particular subnet, although not
necessarily.
VLAN can enhance performance by conserving bandwidth, and improve security by limiting traffic to specific domains.
A VLAN is a collection of end nodes grouped by logic instead of physical location. End nodes that frequently
communicate with each other are assigned to the same VLAN, regardless of where they are physically on the network.
Logically, a VLAN can be equated to a broadcast domain, because broadcast packets are forwarded to only members
of the VLAN on which the broadcast was initiated.