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Protocol-Independent Multicast Last modified: Tuesday, October 15, 2002
Abbreviated PIM, a multicasting routing protocol that runs over an existing unicast infrastructure. There are two variations of PIM: PIM-SM -- Short for PIM-Sparse Mode, which is used when recipients are scattered over a large area. PIM-DM -- Short for PIM-Dense Mode, which is used when the targeted recipients are in a concentrated area.
PIM-SM Multicast Routing Protocol This paper from Microsoft is an introduction to the PIM-SM multicast routing protocol, concentrating on version 2. It is intended for IT managers who are already familiar with multicasting, and who want an overview before reading the PIM-SM RFC. RFC 2117 The full text of RFC 2117 detailing PIM-SM.	Related Categories Electronic Mail Internet Protocols Videoconferencing Related Terms anycast broadcast multicast unicast