The fifth edition of this popular book presents the fundamental concepts of data communications, networking, distributed applications, and network management and security; and uses real world case studies to explicate business environment and business management and staff issues. Up-to-date coverage of key issues-the use of the Internet, intranets, and extranets support business objectives, LANs, WANs, high-speed networks, asychronous transfer mode (ATM) and TCP/IP. Accessible presentation for information systems managers, telecommunications managers, product marketing personnel, and system support specialists.