300-430 Question #34: Real Exam Question with Answer & Explanation

The correct answer is B: Each VideoStream client acknowledges receiving a video IP multicast stream.. The IEEE 802.11 wireless multicast delivery mechanism does not provide a reliable way to acknowledge lost or corrupted packets. As a result, if any multicast packet is lost in the air, it is not sent again which may cause an IP multicast stream unviewable. The Media Stream (forme

Question

Which statement about the VideoStream/Multicast Direct feature is true?

Options

AIP multicast traffic is reliable over WLAN by default as defined by the IEEE 802.11 wireless
BEach VideoStream client acknowledges receiving a video IP multicast stream.
CIt converts the unicast frame to a multicast frame over the air.
DIt makes the delivery of the IP multicast stream less reliable over the air, but reliable over

Explanation

The IEEE 802.11 wireless multicast delivery mechanism does not provide a reliable way to acknowledge lost or corrupted packets. As a result, if any multicast packet is lost in the air, it is not sent again which may cause an IP multicast stream unviewable. The Media Stream (formerly VideoStream) feature makes the IP multicast stream delivery reliable over the air, by converting the multicast frame to a unicast frame over the air. Each Media Stream client acknowledges receiving a video IP multicast stream.

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