Which three statements are true about the data traffic characteristics of voice traffic？ （）
- Alatency must be kept below 150 ms
- Blatency is not a concern as long as jitter is kept below 30 ms
- Cvoice packets do not require a specific type of queuing
- Dvoice packets are rather small
- Evoice packets require TCP for rapid retransmission of dropped packets
- Fvoice packets require a fairly constant bandwidth reserved for voice control traffic as well as forthe voice payload