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Protocol-Independent Multicast

Webopedia Staff
Updated on:
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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