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Routing first-step by Bill Parkhurst

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Chapter 6. Open Shortest Path First—Better, Stronger, Faster

What You Will Learn

After reading this chapter, you should be able to

  • Understand the concepts, terminology, and operation of Open Shortest Path First (OSPF)

  • Understand the basics of configuring OSPF on Cisco routers

OSPF is a hierarchical link-state interior IP routing protocol designed to overcome the limitations of the distance vector routing protocols. Open means that OSPF is a standards-based protocol defined in an RFC. Hierarchical means that an OSPF network can be divided into multiple areas. The distance vector protocols, RIP and IGRP, are single-area routing protocols. A single area means all routes in an area are advertised to all routers in the same area. Because there is only ...

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