[notes]
APs accept IGMP queries only from the router & muticast packets with a source IP address of the WLC to which they are currently associated.
Unicast- the WLC unicasts ever multicast packet to every AP associated to the controller. This is inefficient
Multicast- the WLC sends multicast packets to a multicast group. Packet replication is done by the network.
Broadcast & Multicast traffic
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