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CCCENT/CCNA ICND1 100-105 Official Certification Guide, First Edition by Wendell Odom

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Chapter 4. Fundamentals of IPv4 Addressing and Routing

This chapter covers the following exam topics:

3.0 Routing Technologies

3.1 Describe the routing concepts

3.1.a Packet handling along the path through a network

3.1.b Forwarding decision based on route lookup

3.1.c Frame rewrite

The TCP/IP network layer (Layer 3) defines how to deliver IP packets over the entire trip, from the original device that creates the packet to the device that needs to receive the packet. That process requires cooperation among several different jobs and concepts on a number of devices. This chapter begins with an overview of all these cooperating functions, and then it dives into more detail about each area, as follows:

IP routing: The process of hosts and routers ...

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