CCNA 200-301 Official Cert Guide Library, 2nd Edition

Chapter 16

First Hop Redundancy Protocols

This chapter covers the following exam topics:

3.0 IP Connectivity

3.5 Describe the purpose, functions, and concepts of First Hop Redundancy Protocols

Any host’s default router serves as the first router, or first hop, in the routing path from sender to receiver. However, IPv4 did not include high-availability and redundancy features related to the default router. IP hosts use a single setting with a single default router IP address. Also, IP did not define a backup or load-sharing mechanism for multiple routers connected to the same subnet.

First Hop Redundancy Protocols (FHRPs) add the function of redundancy and load sharing for the default router function in any subnet.

This chapter begins with the ...