Application-Level -- Latency and User Behaviour on a Multiplayer Game Server -- Application-Level Multicast Using Content-Addressable Networks -- Scribe: The Design of a Large-Scale Event Notification Infrastructure -- Group Management -- Scamp: Peer-to-Peer Lightweight Membership Service for Large-Scale Group Communication -- Extremum Feedback for Very Large Multicast Groups -- An Overlay Tree Building Control Protocol -- Performance -- The Multicast Bandwidth Advantage in Serving a Web Site -- STAIR: Practical AIMD Multirate Multicast Congestion Control -- Impact of Tree Structure on Retransmission Efficiency for TRACK -- Security -- Framework for Authentication and Access Control of Client-Server Group Communication Systems -- Scalable IP Multicast Sender Access Control for Bi-directional Trees -- EHBT: An Efficient Protocol for Group Key Management -- Topology -- Aggregated Multicast with Inter-Group Tree Sharing -- Tree Layout for Internal Network Characterizations in Multicast Networks.