— Exhibit —
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In the exhibit, the routers in the network have a default PIM sparse mode configuration. R2 shows
that R1 is the RPF next hop for the source, and R3 is the RPF next hop for the RP. Host1 is
currently receiving multicast traffic for group 231.1.1.1. Host2 has come online and is attempting to
join group 232.1.1.1. R2 has just received an IGMP message with the source and group
addresses.
Which step happens next so that Host2 can join the multicast group?
A.
R2 sends a PIM join upstream towards R3 to join the shared tree.
B.
R2 sends a PIM join upstream towards R3 to join the source tree.
C.
R2 sends a PIM join upstream towards R1 to join the shared tree.
D.
R2 sends a PIM join upstream towards R1 to join the source tree.