This module defines the purpose of Virtual Local Area Networks and describes
how VLAN implementation can simplify network management and troubleshooting and
can improve network performance. When VLANs are created, their names and
descriptions are stored in a VLAN database that can be shared between switches.
You will see how design considerations determine which VLANs will span all the
switches in a network and which VLANs will remain local to a switch block. The
configuration components of this module will describe how individual switch
ports may carry traffic for one or more VLANs depending on their configuration
as access or trunk ports. This Module explains both why and how VLAN
implementation occurs in an enterprise network.