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This is the official book of Interop the leading communications' industry networking conference attended by over 25,000 people. This up-to-date guide reviews major trends in the field of computer networks and interoperability, handing the reader leading-edge coverage of open system security, gigabit networks, communications standards, SMDS (Switched Multimegabit Data Service), ISDN (Integrated Systems Digital Network), FDDI (Fiber Distributed Data Interface), TCP/IP (Transmission Control Protocol/Internet Protocol), and other hot topics. It looks at interoperability from many different levels and perspectives, showing how to turn computer networks from different vendors into a coherent, transparent, powerful computing network. Coverage starts with a look at the Internet and the other maze of networks that form the global matrix, then delves into the complexities of the protocol stack and the three families of upper-level standards that allow networks to interoperate. Appropriate for anyone who implements, buys, or uses networks.