Chapter 22

Network Layer

Objectives

Upon completion of this chapter, you will be able to answer the following questions:

  • How does the network layer use IP protocols for reliable communications?

  • What is the role of the major header fields in the IPv4 packet?

  • What is the role of the major header fields in the IPv6 packet?

Key Terms

This chapter uses the following key terms. You can find the definitions in the Glossary.

best effort

connectionless

fragmentation

Internet Control Message Protocol (ICMP)

maximum transmission unit (MTU)

media independent

routing

Introduction (22.0)

Hi again! Bob also had to learn a lot about the network layer in his courses before he became an IT specialist. The network layer, or OSI Layer 3, provides services ...

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