Modern data networks are all based on the Internet or on IP (Internet Protocol). But many people remain confused by multiprotocol networks. How do all the protocols fit together? How do I build a network? What do all the components do? What sort of problems should I expect? Data Networks, IP and the Internet is intended not only for network designers and practitioners, who may have long sought a 'bible' on protocols and data networking, but also for the newcomer - eager to understand the principles and put the plethora of 'protocols' into context. Written in a clear and accessible style and liberally illustrated, this volume introduces a novice methodically to the concepts and language (or 'jargon') of data communications. It explains the basic communications principles in depth and explains how each new detailed topic builds on these principles. The full range of protocols are covered and there are plenty of first-hand practical tips for building and operating modern data networks. For the experienced telecommunications engineer an extensive index, glossary and set of appendices are included, allowing the reader to 'dip in' and understand a particular subject quickly. These provide a useful single reference for information about interfaces, protocol field names and formats, RFCs (Internet specifications) and acronyms.