TY - BOOK AU - Shelly, Gary B. AU - CASHMAN, Thomas J. SERWATKA, Judy A. TI - Business data communications : introductory concepts and techniques AV - HD30.335.S54 PY - 2004/// CY - Australia PB - Thomson KW - Data transmission systems. N1 - Includes index; Contents: Introduction to communication -- Fundamentals of data communications -- Communications media, servers and clients -- Communication equipment -- Data transmission -- Protocols -- Network concepts -- Wide area and metropolitan area networks -- Local area networks -- Network security -- Internet -- Communications services -- E-business applications and business data communications industry -- Addressing the challenge of living in a connected world ER -