This is the Second Edition of Vol. III BSD Socket Version from one of the most popular TCP/IP Internetworking series ever published. This new edition includes code in ANSI C throughout. This is the only book available who's central theme is software design that teaches designers how to structure clients and servers. The server designs are directly applicable to WWW and other applications. The authors present the most complete coverage of server technology that allows designers to understand the costs and benefits of advanced server technologies. In addition, the Second Edition discusses the use of application gateways to allow client-server communication across heterogeneous protocols.