How is RPF used in multicast routing?

seenagapeJuly 16, 2015

A.
to prevent multicast packets from looping

B.
to prevent PIM packets from looping

C.
to instruct PIM where to send a (*, G) or (S, G) join message

D.
to prevent multicast packets from looping and to instruct PIM where to send a (*, G) or (S, G)
join message

Explanation:

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