Chapter Three. Routing and Forwarding Processes

This chapter covers generic questions about the routing and forwarding processes. Operation of datagram networks, basics of routing table construction and packet-forwarding processes, and details of router operation in classful and classless environments are discussed.

For a long time, the term routing has been used interchangeably with the term forwarding. However, it is common today to differentiate these two notions.

In this book, as well as in the industry, the term routing is used to describe the functionality performed by the control software of the routers. This includes routing table maintenance, processing of static routes, dynamic routing protocols, and so on. The term forwarding is used ...

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