10.1. Routing Protocol Basics
Because getting a solid visual can really help people learn, I'm going to get you started by combining the last few figures used in Chapter 9, "Introduction to Routing." This way, you can get the big picture and really understand how routing works. Figure 10.1 shows the complete routing tree that I broke up piece by piece at the end of Chapter 9.
As I touched on in Chapter 9, there are two types of routing protocols used in internetworks: interior gateway protocols (IGPs) and exterior gateway protocols (EGPs). IGPs are used to exchange routing information with routers in the same autonomous system (AS). An AS is a collection of networks under a common administrative domain, which simply means that all routers sharing ...
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