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This chapter is from the book

This chapter is from the book

Summary

Here are the main topics covered in this chapter:

  • This chapter discusses how routers forward traffic through a network based on source and destination IP addresses.

  • This chapter also covers the sources of route information used to populate a router’s routing table. These sources include directly connected routes, statically configured routes, and dynamically learned routes.

  • This chapter distinguishes between routed protocols (for example, IP) and routing protocols (such as OSPF or EIGRP).

  • Some routing sources are more trustworthy than other routing sources, based on their administrative distances.

  • Different routing protocols use different metrics to select the best route in the presence of multiple routes.

  • This chapter distinguishes between IGPs (which run within an autonomous system) and EGPs (which run between autonomous systems).

  • This chapter contrasts the behavior of distance-vector and link-state routing protocols and shows how split horizon and poison reverse can prevent routing loops in a distance-vector routing protocol environment.

  • This chapter describes today’s most popular routing protocols (including RIP, OSPF, IS-IS, EIGRP, and BGP), along with their characteristics.

  • This chapter reviews various QoS technologies, with an emphasis on traffic shaping, which can limit the rate of data transmission on a WAN link to the CIR.

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