CCDE: Cisco Certified Design Expert (Practical) — Question 56

Which design solution reduces the amount of IGMP state in the network?

Answer options

• A. one multicast group address thorough network regardless of IGMP version
• B. multiple multicast domains
• C. IGMP filtering
• D. IGMPv3 with PIM-SSM

Correct answer: D

Explanation

The correct answer, D (IGMPv3 with PIM-SSM), is effective because it allows for source-specific multicast, reducing the IGMP state by only tracking the required sources. Option A is incorrect as a single multicast address does not reduce state effectively with multiple sources. Option B introduces complexity rather than reducing state, while option C, IGMP filtering, may help but does not provide the same level of efficiency as using IGMPv3 with PIM-SSM.