An administrator is implementing a multicast solution in a multi-VLAN network.
Which statement is true about theconfiguration of the switches in the network?
A . IGMP must be enabled on all routed interfaces where multicast traffic will traverse
B . IGMP snooping must be enabled on all interfaces on a switch to intelligently forward traffic
C . IGMP requires join and leave messages to graft and prune multicast streams between switches
D . IGMP must be enabled on alt interfaces where multicast sources and receivers are connected
Answer: C