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Network Basics Companion Guide by Cisco Networking Academy

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Chapter 6. Network Layer

Objectives

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

Image What is the purpose of the network layer in data communication?

Image Why does the IPv4 protocol require other layers to provide reliability?

Image What is the role of the major header fields in IPv4 and IPv6 packets?

Image How does a host device ...

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