The new edition of the book, dedicated to creating web servers, client-server applications, or any other network software on the UNIX operating system, is a classic guide to network programming interfaces, particularly sockets. It is based on the writings of William Stevens and has been completely revised and updated by two leading network programming experts. The book includes descriptions of key modern standards, implementations and methods, it contains a large number of illustrative examples and can be used both as a textbook on network programming and as a reference for experienced programmers.