Presenting a state-of-the-art view of transmission control for multimedia applications and communication system architectures, this work focuses on the problems of achieving efficient transmission of multimedia time-constrained application data using high-speed networks and internetworks. Key areas covered include: protocol development; quality of service issues; protocol analysis; high-performance architectures; implementattion of high-speed protocols; experimental studies; application-oriented issues; application-controlled communication systems; protocols for distributed multimedia applications; and protocol implementation tools. It contains the selected proceedings of the Fifth International Workshop on Protocols for High-Speed Networks, organized by the International Federation for Information Processing.