December 1993
Beginner
600 pages
16h 50m
English
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Chapter 18. TCP Connection Establishment and Termination
Introduction
TCP is a connection-oriented protocol. Before either end can send data to the other, a connection must be established between them. In this chapter we take a detailed look at how a TCP connection is established and later terminated.
This establishment of a connection between the two ends differs from a connectionless protocol such as UDP. We saw in Chapter 11 that with UDP one end just sends a datagram to the other end, without any preliminary handshaking.
Connection Establishment and Termination
To see what happens when a TCP connection is established and then terminated, we type the following command on the system svr4:
svr4 % telnet bsdi discard Trying 140.252.13.35 ... Connected ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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