Provides expanded coverage of LANs and WANs and added material on international topics, clientserver, the Internet, and mobile computing. This introduction to data communications provides students with a thorough understanding of both the technical and managerial aspects of the field. Features of this work include: glossary definitions in the margin; more emphasis on network material from both the managerial and technical perspective; new material on international networking including regulations, hardware and other important issues; and updated material on technical innovations.