4. (TCO 7) Pseudowires are used to help MPLS and there are a number of aspects of pseudowires

that need to be explained. Answer the four parts about pseudowires; each worth 10 points.

Part 1: What is the purpose of pseudowires as it relates to MPLS?

Part 2: Describe how and why pseudowires are allowed to be multiplexed in the same tunnel.

Part 3: Explain the relationship between pseudowire and how MPLS labels affect traffic within the MPLS network.

Part 4: What is the purpose of Ethernet pseudowires?(Points : 40)