What is the default behavior of PIM-SSM If there are multiple equal-cost paths to the multicast
source?

A.
It will send the join only to the neighbor with the highest IP address.

B.
It will send the join only to the neighbor with the lowest IP address.

C.
It will send the join in a round-robin fashion across all neighbors.

D.
It will send the join to all neighbors.

Explanation:
By default, for Protocol Independent Multicast sparse mode (PIM-SM), Source Specific Multicast
(PIMSSM), bidirectional PIM (bidir-PIM), and PIM dense mode (PIM-DM) groups, if multiple equalcost paths are available, Reverse Path Forwarding (RPF) for IPv4 multicast traffic is based on the
PIM neighbor with the highest IP address. This method is referred to as the highest PIM neighbor
behavior. This behavior is in accordance with RFC 2362 for PIM-SM, but also applies to PIM-SSM,
PIM-DM, and bidir-PIM.