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IPv4 Routing Protocol Concepts

Chapter Description

This chapter from CCNA Data Center DCICN 640-911 Official Cert Guide introduces the concepts behind Interior Gateway Protocols (IGPs), typically used inside one company. In particular, this chapter discusses the theory behind types of routing protocols, including distance vector and link-state logic. The chapter also introduces the Routing Information Protocol (RIP), Enhanced Interior Gateway Routing Protocol (EIGRP), and Open Shortest Path First (OSPF) routing protocol.

Exam Preparation Tasks

Review All the Key Topics

Review the most important topics from this chapter, noted with the Key Topic icon. Table 20-5 lists these key topics and where each is discussed.


Table 20-5 Key Topics for Chapter 20

Key Topic Element


Page Number

Table 20-3

Key features of RIPv1 and RIPv2



How SPF calculates the metric for a route


Figure 20-14

How OSPF’s SPF algorithm analyzes and selects the best route


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