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| Description: | PIM ( Protocol Independent Multicast ) is "protocol for efficiently routing multicast groups that may span wide-area (and inter-domain) internets". You can read the draft of PIM at http://www.ietf.org/internet-drafts/draft-ietf-pim-sm-v2-new-07.txt See an overview of PIM at http://netweb.usc.edu/pim/ |