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Small group multicast: a new solution for multicasting on the Internet

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3 Author(s)
Boivie, R. ; IBM Thomas J. Watson Res. Center, Yorktown Heights, NY, USA ; Feldman, N. ; Metz, C.

The Internet's global ubiquity has fostered numerous applications that use many different communications models. Applications like FTP Web browsing, and e-mail employ a unicast model where two parties exchange data over logical point-to-point connections. In other applications, such as multiparty audio/video conferencing and collaborative gaming, a source sends data to multiple parties. One way to support multiparty communications is with unicast connections between the source and all of the receivers. If a group has N parties, then a source must set up N-1 unicast connections and transmit the data N times over the network. When N is large, scalability becomes an issue for the source and the network. IP multicast solves this problem by sending a single copy of the data over a distribution tree that is rooted at the source and that branches out to the various destinations. Because the source transmits a single copy of the data, only one copy of the data appears on the branches in the distribution tree

Published in:

Internet Computing, IEEE  (Volume:4 ,  Issue: 3 )