How does IGMP function with multicast routing and PIM?

A. IGMP is enabled automatically when multicast routing and PIM are configured on a router
B. IGMP is incompatible with multicast routing
C. IGMP is incompatible with PIM
D. IGMP must be enabled manually when multicast routing and PIM are configured on a router.

How does IGMP function with multicast routing and PIM?

A. IGMP is enabled automatically when multicast routing and PIM are configured on a router
B. IGMP is incompatible with multicast routing
C. IGMP is incompatible with PIM
D. IGMP must be enabled manually when multicast routing and PIM are configured on a router.

Correct Answer: A

IGMP is used between hosts on a LAN and the routers on that LAN to track the multicast groups of which hosts are members. Protocol Independent Multicast (PIM) is used between routers so that they can track which multicast packets to forward to each other and to their directly connected LANs.