Which three statements about the VideoStream feature (also known as MediaStream) on the Cisco WLC are true? (Choose three.)
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A. B. C. D. E. F.ADE.
VideoStream (MediaStream) is a feature available on Cisco Wireless LAN Controllers (WLCs) that optimizes video streaming on wireless networks. It supports a variety of video formats, including HTTP Live Streaming (HLS), Microsoft Smooth Streaming, and MPEG-DASH.
The following are the three statements about the VideoStream feature on the Cisco WLC that are true:
A. It unicasts the stream only to clients that are subscribed via IGMP. This statement is true. The VideoStream feature works by unicasting the video stream to clients that have requested the video stream via Internet Group Management Protocol (IGMP) membership reports. This ensures that only clients that want to receive the video stream receive it, reducing unnecessary network traffic.
B. It works both ways (from network to client and from client to network). This statement is false. The VideoStream feature only works in one direction, from the network to the client. It does not support client-to-network video streaming.
C. It unicasts the stream only to APs on which you enable the feature. This statement is false. The VideoStream feature does not require AP-level configuration. Instead, it is configured globally on the WLC, and the WLC unicasts the video stream to the appropriate APs based on the IGMP membership reports received from clients.
D. It sends unicast, so it can usually use higher data rates. This statement is true. VideoStream uses unicast transmission, which enables the WLC to take advantage of higher data rates and improve the overall video streaming experience for clients.
E. It unicasts the multicast stream over the air only; it multicasts on wired connections. This statement is false. VideoStream uses unicast transmission for both wired and wireless connections. It does not use multicast transmission at all.
F. It multicasts, so a large number of subscribed clients on the AP will not consume more bandwidth. This statement is false. As stated earlier, VideoStream uses unicast transmission, not multicast transmission. Therefore, a large number of subscribed clients on an AP will consume more bandwidth, as each client will receive its own unicast stream. However, VideoStream's ability to use higher data rates can help mitigate this issue.