This book introduces new managers and users to the basic concepts and nomenclature of networking. Written in simple, straightforward language, the book describes concepts clearly, without assuming prior familiarity with networking equipment or software. The glossary provides a quick reference for unfamiliar terms. This third edition has been revised and expanded to cover the latest technical developments. New and expanded topics in this edition include ethernet switching, groupware, telecommuting technology, wireless WANs, fiber optics, NetWare directory services, dial-up internetworking, frame relay, inverse multiplexing, and more.