求解题库293 ipv4 multicast 答案争议

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Which two statements about IPv4 multicast traffic are true? (Choose two.)

A. It burdens the source host without affecting remote hosts.

B. It uses a minimum amount of network bandwidth.

C. It is bandwidth-intensive.

D. It simultaneously delivers multiple streams of data.

E. It is the most efficient way to deliver data to multiple receivers.
答案 DE
乾颐堂讲解 选 BE
官网原话 IP multicast is a bandwidth-conserving technology thatreduces trafficby simultaneously delivering a single stream of information to potentiallythousands of corporate recipients and homes. Applications that takeadvantage of multicast include video conferencing,  D 选项说是deliver multiple streams 显然不对啊。 IP multicast deliversapplication source traffic to multiple receivers without burdening the sourceor the receivers while using a minimum of network bandwidth. 选b是有依据的 虽然有点断章取义的感觉

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