A building permits desk streams council meetings and wants desktops to express interest in a specific encoder source rather than any sender to the group. Which IGMP version and capability should the edge design require?
Select an answer to reveal the explanation.
Short Explanation
Think of the stream like a radio dial where you pick the station and the studio. IGMPv3 lets a desktop say “I want group G, but only from this encoder,” which is exactly what source-specific multicast needs. Older IGMP versions only name the group, so any talker can join the party.
Full Explanation
IGMPv3 adds source filtering so receivers can INCLUDE or EXCLUDE specific sources for a multicast group, enabling Source-Specific Multicast (SSM) signaling on the LAN. IGMPv1 and IGMPv2 report only group membership and cannot convey per-source interest. Designs that need desktop-driven SSM therefore require IGMPv3 (or MLDv2 in IPv6) end-to-end on the receiver VLAN.