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350-401 · Question #610
350-401 Question #610: Real Exam Question with Answer & Explanation
The correct answer is A: support for Source Specific Multicast. IGMPv3's key enhancement over IGMPv2 is its ability to support Source Specific Multicast, allowing hosts to specify which multicast sources they want to receive traffic from.
Submitted by asante_acc· Mar 6, 2026Infrastructure
Question
Which enhancement does IGMP version 3 offer over IGMP version 2?
Options
- Asupport for Source Specific Multicast
- Ba mechanism to decrease leave latency
- Cauthentication of multicast streams
- Dbackward compatibility with IGMP version 1
Explanation
IGMPv3's key enhancement over IGMPv2 is its ability to support Source Specific Multicast, allowing hosts to specify which multicast sources they want to receive traffic from.
Common mistakes.
- B. While IGMPv3 refines group leave messaging, the primary and most significant enhancement regarding new functionality is SSM, and IGMPv2 already had mechanisms like Leave Group messages to decrease leave latency.
- C. IGMP is a signaling protocol for group membership and does not provide authentication for multicast streams; this functionality is typically handled at higher layers or by other security protocols.
- D. All versions of IGMP are designed with some level of backward compatibility, but this is a general design principle for protocol evolution and not a unique enhancement of IGMPv3 over IGMPv2.
Concept tested. IGMPv3 Source Specific Multicast capabilities
Topics
#IGMPv3#IGMPv2#Source Specific Multicast#Multicast Protocols
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