17 TCP/IP II
DOI: 10.1201/9781003420415-17
17.1 Introduction
TCP and IP are extremely important protocols as they allow hosts to communicate over the Internet in a reliable way. TCP provides a connection between two hosts and supports error handling. This chapter discusses TCP in more detail and shows how a connection is established then maintained. An important concept of TCP/IP communications is the usage of ports and sockets. A port identifies the process type (such as FTP, TELNET, and so on) and the socket identifies a unique connection number. In this way TCP/IP can support multiple simultaneous connections of applications over a network.
The IP header is added to higher-level data. This header contains a 32-bit IP address of the destination ...
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