HPE Aruba Certified Network Security Expert (ACNSX) — Question 29

How does PIM build the IP multicast routing table to route traffic between a multicast source and one or more receivers?

Answer options

• A. It uses the unicast routing table and reverse path forwarding (RPF)
• B. It uses IGMP and calculates a shortest path tree (SPT)
• C. It uses the shortest path first (SPF) algorithm derived from link state protocols
• D. It uses the Bellman-Ford algorithm derived from distance vector protocols

Correct answer: A

Explanation

The correct answer is A because PIM leverages the unicast routing table along with reverse path forwarding (RPF) to ensure efficient multicast routing. The other options involve protocols or methods that are not directly related to how PIM operates in establishing multicast routes.