PIM Source-Specific Multicast (PIM-SSM)

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PIM Source-Specific Multicast (PIM-SSM) – A PIM mode in which receivers join a specific (source, group) pair rather than any source for a group, building distribution trees rooted at the source; used when the source is known in advance, for a more efficient, scalable, and secure model. See: Multicast, Configure IP Multicast