Chapter 2
1. C. A hybrid VPN uses more than one VPN technology. While you can encrypt a packet that has already been encapsulated by a VPN technology, and while you can encapsulate a packet that has already been encrypted, you might need to decrease the MTU for a frame on an interface configured for tunneling. The reason for the MTU decrease is that additional header information is added for each VPN technology you use. As a result, the maximum amount of data contained in a frame is reduced.
2. A. In a Layer 3 MPLS VPN, a customer edge (CE) router forms a neighborship with a provider edge (PE) router (or an edge label switch router [ELSR]) in an MPLS network. In a Layer 2 MPLS VPN, the MPLS network acts as a Layer 2 switch. IP multicast traffic ...
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