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.
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