What is characteristic of multicast mode that affects the wireless network when configured on a Cisco WLC?

While multicast does involve group addressing, this answer misidentifies the defining characteristic - the key distinction of multicast mode is where replication occurs, not simply that packets are sent to a group.

Packet replication on the controller describes unicast mode behavior, where the WLC individually replicates and sends a separate copy to each associated AP.

In multicast mode, the WLC sends a single multicast packet to a multicast group address, and the network infrastructure (routers and switches) is responsible for replicating the packet to each AP that has subscribed to that multicast group. This offloads replication from the controller to the network, making it more scalable than unicast mode where the controller individually replicates each packet per AP.

Sending every multicast packet individually to each associated AP is the behavior of unicast mode, not multicast mode, which relies on a single multicast group transmission.