The marketing department in a retail company has created a promotional video for the opening of a new branch store shp-GA4B6C860927AB. The video must be received by interested hosts only, over wireles

WMM (Wi-Fi Multimedia) is a QoS mechanism that prioritizes traffic by access category (voice, video, best effort, background) but does not control multicast group membership or restrict delivery to interested hosts.

TPC (Transmit Power Control) dynamically adjusts AP transmit power to optimize coverage and reduce interference, and has no role in multicast group management or video delivery.

WMF (Wireless Multicast Forwarding) allows the WLC to track IGMP membership reports from wireless clients and forward multicast traffic - such as a promotional video stream - only to clients that have joined the relevant multicast group. This prevents unnecessary flooding of multicast frames across the wireless medium and ensures delivery to interested hosts only, which directly satisfies the requirement.

DCA (Dynamic Channel Assignment) automatically selects the best RF channels for APs to minimize interference, and is unrelated to multicast forwarding or video distribution.