Answers to Chapter 11 Review Questions

1: What is the difference between routing and Layer 3 switching?

A: In one sense, nothing . In another sense, the term routing implies that the forwarding is software-based where the term Layer 3 switching implies that hardware-based forwarding is used. In both cases, general-purpose CPUs are used to handle control plane functions (such as routing protocols and configuration).

2: Can the router-on-a-stick approach to inter-VLAN routing also support inter-VLAN bridging?

A: Yes. Simply configure a bridge-group on multiple subinterfaces. Example A-6 bridges protocols other than IP, IPX, and AppleTalk between VLANs 1 and 2.

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