Assume that the R1 router is enabled for PIM-SM and receives a multicast packet sourced from 172.16.1.100, and the R1 router has multicast receivers on the Gi0/1, Gi0/2, Gi0/3 and Gi0/4 interfaces.
The multicast packet from the 172.16.1.100 source must arrive on which interface on the R1 router for it to be forwarded out the other interfaces?
A . Gi0/1
B . Gi0/2
C . Gi0/3
D . Gi0/4
E . Gi0/1 or Gi0/2 or Gi0/3 or Gi0/4
F . Gi0/2 or Gi0/3
G . Gi0/1 or Gi0/4
Answer: A