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The Illustrated Network by Walter Goralski

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CHAPTER 6 IPv4 and IPv6 Headers

What You Will Learn

In this chapter, you will learn about the IP layer. We’ll start with the fields in the IPv4 and IPv6 packet headers. We’ll discuss most of the fields in detail and show how many of them relate to each other.

You will learn about fragmentation, and how large content is broken up, spread across a sequence of many packets, and reassembled at the destination. We’ll also talk about some of the perceived hazards of this fragmentation process.

Thus far, we’ve created a network of hosts and routers, linked them with a variety of architectures and link types (LANs and WANs), and discussed the frame formats and methods used to distribute packets among the nodes. We’ve considered the IPv4 and IPv6 ...

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