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Part II: Core Protocols > Chapter 11: Transmission Control Protocol

CHAPTER 11 Transmission Control Protocol

What You Will Learn

In this chapter, you will learn about the TCP transport layer protocol, which is the connection-oriented, more reliable companion of UDP. We’ll talk about all the fields in the TCP header (which are many) and how TCP’s distinctive three-way handshake works.

You will learn how TCP operates during the data transfer and disconnect phase, as well as some of the options that have been established to extend TCP’s use for today’s networking conditions.

The Transmission Control Protocol (TCP) is as complex as UDP is simple. Some of the same concepts apply to both because both TCP and UDP are end-to-end protocols. Sockets and ports, well-known, dynamic, and private, apply to both. TCP is IP protocol 6, but the ports are usually the same as UDP and run from 0 to 65,535. The major difference between UDP and TCP is that TCP is connection oriented. And that makes all the difference.


  

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