A report that provides a thorough background on Fiber Distributed Data Interface (FDDI) and Asynchrous Transfer Mode (ATM) technologies. It explores what these technologies are, what they can do, and how they compare to each other. It demystifies the technologies by providing a management overview while giving specific information on products and operational characteristics. The report is intended to help with technology selection, product selection, and network planning. Technologies that are competitive to FDDI and ATM, such as Switched Multi-megabit Data Service (SMDS), Fast Ethernet (100 megabits per second), and Frame Relay, are also explained and reviewed. Annotation copyright Book News, Inc. Portland, Or.