For Business Data Communications, Data Communications, and introductory Networking for Business courses. The fifth edition of this popular text presents the fundamental concepts of data communications, networking, distributed applications, and network management and security; it relates specifically to the business environment and business management. Includes up-to-date coverage of key issues for the business student--high-speed networks, asychronous transfer mode (ATM) and TCP/IP, and the use of the Internet, intranets, and extranets support business objectives. It is the only book with a top-down Internet first organization. It is the only book with a top-down, Internet first organization.