Multicast pim spare-mode send traffic overload. Which feature can reduce the multicast traffic in the access layer?

A.
Filter at Boundaries

B.
PIM Dense-Mode

C.
IGMP snooping

D.
MSDP

Explanation:
“Cisco Group Management Protocol (CGMP), Router Group Management Protocol (RGMP), and IGMP snooping efficiently constrain IP multicast in a Layer 2
switching environment”
Internet Group Management Protocol (IGMP) snooping streamlines multicast traffic handling for VLANs. By examining (snooping) IGMP membership report
messages from interested hosts, multicast traffic is limited to the subset of VLAN interfaces on which the hosts reside.