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One
of the two Protocol Independent Multicast (PIM) operational modes. PIM dense
mode is data-driven and resembles typical multicast routing protocols. Packets
are forwarded on all outgoing interfaces until pruning and truncation occurs.
In dense mode, receivers are densely populated, and it is assumed that the
downstream networks want to receive and will probably use the datagrams that
are forwarded to them. The cost of using dense mode is its default flooding
behavior. Sometimes called dense mode PIM or PIM DM. Contrast with PIM
sparse mode. See also PIM.
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