Summary
An understanding of the following key points should have been achieved:
  • The origins and functions of VLAN trunking
  • How trunking enables the implementation of VLANs in a large network
  • IEEE 802.1Q
  • Cisco ISL
  • Configuring and verifying a VLAN trunk
  • Definition of VLAN Trunking Protocol (VTP)
  • Why VTP was developed
  • The contents of VTP messages
  • The three VTP modes
  • Configuring and verifying VTP on an IOS-based switch
  • Why routing is necessary for inter-VLAN communication
  • The difference between physical and logical interfaces
  • Subinterfaces
  • Configuring inter-VLAN routing using subinterfaces on a router port