If a (*, G) entry exists in the RP, which of the following statements about the source registration process are true in PIM-SM?

If a (*, G) entry exists in the RP, which of the following statements about the source registration process are true in PIM-SM?
A . The first hop DR connecting to the source encapsulates received multicast data into PIM registration information and unicasts the encapsulated information to the R
C . The first-hop DR connecting to the source sends received multicast data to the RP hop by hop.
D . The RP decapsulates registration information and uses RPT to send data packets to be sent to the multicast group to the outbound interface.
E . The RP sends an (S, G) Join message hop by hop to the first hop DR connected to the multicast source to add the multicast source to the SP
G . The RP unicasts a registration stop message to the first hop router connected to the multicast source.

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Answer: A, C, D, E