A transit authority runs a Layer-2 core and wants to stop flooding PIM Hellos and Joins to every switch port in the VLAN. Which optimization specifically constrains that multicast control traffic on L2?
Select an answer to reveal the explanation.
Short Explanation
IGMP snooping watches the audience; PIM snooping watches the stage crew radios. In a big L2 core, PIM messages can spam every port unless the switch learns where the real routers live and ships control packets only that way. That keeps the control plane from becoming its own flood storm.
Full Explanation
PIM snooping (on capable Layer-2 devices) restricts flooding of PIM control messages by learning multicast-router ports and forwarding those messages selectively. It complements IGMP/MLD snooping, which focuses on receiver interest for data groups. Static ARP, STP tweaks, and IP Source Guard address different problems and do not optimize PIM control-plane distribution on a Layer-2 core.