Chapter 1 Introduction

Millions of computers all over the world are now connected to the worldwide network known as the Internet. The Internet enables programs running on computers thousands of miles apart to communicate and exchange information. If you have a computer connected to a network, you have undoubtedly used a Web browser—a typical program that makes use of the Internet. What does such a program do to communicate with others over a network? The answer varies with the application and the operating system (OS), but a great many programs get access to network communication services through the “sockets” application programming interface (API). The goal of this book is to get you started writing programs that use the sockets API.

Before ...

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