题目内容

Which three statements are true about the data traffic characteristics of voice traffic？（）

A. latency must be kept below 150 ms
B. latency is not a concern as long as jitter is kept below 30 ms
C. voice packets do not require a specific type of queuing
D. voice packets are rather small
E. voice packets require TCP for rapid retransmission of dropped packets
F. voice packets require a fairly constant bandwidth reserved for voice control traffic as well as forthe voice payload

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