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

A、A.latency must be kept below 150 ms

B、B.latency is not a concern as long as jitter is kept below 30 ms

C、C.voice packets do not require a specific type of queuing

D、D.voice packets are rather small

E、E.voice packets require TCP for rapid retransmission of dropped packets

F、F.voice packets require a fairly constant bandwidth reserved for voice control traffic as well as forthe voice payload