... multicast limits their ap-plicability. As a result, application-level multicast is gaining popularity. Appropriatealgorithms and systems for scalable subscription management and scalable, reliablepropagation ... 2001.15. S. Ratnasamy, P. Francis, M. Handley, R. Karp, and S. Shenker. A Scalable Content-Addressable Network. In Proc. of ACM SIGCOMM, August 2001.16. E. Zegura, K. Calvert, and S.Bhattacharjee. ... act as a publisher, a root of a multicast tree, a subscriber to a topic, a node within a multicast tree, and any sensible combination of the above. Much of the scalability and reliability of Scribe...