Chapter Summary and Review

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In this chapter, we covered VPN formats in an MPLS system, compared several leading L2 VPN proposals, and learned how data and routing are processed in L3 VPNs. In addition, we conducted two case studies to give customers an MPLS VPN alternative to higher-cost networks.

Knowledge Review 

Part One: Compare and contrast the following characteristics of three Layer-2 VPNs (LT2Pv3, Martini, and Kompella).

1. Headers

2. Forwarding tables

3. Interface capabilities ________

Part Two: Answer the following questions.

1. How are routing tables passed between CEs?

2. How are non-globally unique addresses processed and separated? ________

Part Three: Answer the following multiple-choice questions by selecting the option that best answers the question.

1. VPN tunnels can be built from which of the following?

   A.	PE-to-PE	________
   B.	PE-to-CE	________
   C.	CE-to-CE	________
   D.	Both A and C	________
   E.	Both B and C	________

2. Which of the following is not used in PE-PE VPNs to connect to customer sites?

   A.	Ethernet	________
   B.	Frame Relay	________
   C.	ATM	________
   D.	Secondary Tunnel	________
   E.	Virtual Channel	________

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