Problem
1. Show how an MPLS packet is encapsulated in a frame. Find out what should be the value of the type field when the protocol is the Ethernet.
2. Compare Multi-Layer Switching (MLS) used by Cisco Systems Inc. with MPLS technology we described here.
3. Some people argue that the MPLS should be called layer 2.5 in the TCP/IP protocol suite. Do you agree? Explain.