This module described VLANs and how their implementation can benefit network
management and troubleshooting while improving network performance. When VLANs
are created, their names and descriptions are stored in a VLAN database that
can be shared between switches. Design considerations were identified that
determine which VLANs will be End-to-End and which VLANs will remain local to a
switch block. The use of trunking protocols such as ISL and 802.1Q were
covered. These allow individual switch ports to carry traffic for one or more
VLANs. Access ports allow connection of hubs, servers and end-user devices.
This module explained both why and how VLAN implementation occurs in an
enterprise network. The function and configuration of the VLAN Trunking
Protocol (VTP) was covered along with the process of adding a new switch to an
existing network LAN.