This book constitutes the refereed proceedings of the 5th International IFIP-TC6 Networking Conference, NETWORKING 2006, held in Coimbra, Portugal in May 2006.

The 88 revised full papers and 31 poster papers were carefully reviewed and selected from 440 submissions. The papers are organized in topical sections on caching and content management, mobile ad-hoc networks, mobility/handoff, monitoring/measurements, multicast, multimedia, optical networks, peer-to-peer, resource management and QoS, routing, topology and location awareness, traffic engineering, transport protocols, wireless networks, and wireless sensor networks.