Inter-VLAN routing is the process of forwarding traffic from one VLAN to another VLAN by using a layer-3 device. Separate physical gateway on the router or called legacy interVLAN routing technique has a significant limitation as routers have a limited number of physical ports to connect to different VLANs. If the number of VLANs increases on a network, having one physical router interface per VLAN will quickly exhaust the physical port capacity of a router.

A. Explain how this limitation can be overcome. Include a diagram to illustrate your proposed solution(s).

B. Name the IEEE 802 standard protocol which support VLAN and explain the difference between its frame format from 802.1 Ethernet frame using a diagram.

C. What are the advantages of VLAN?