单选题Which two statements are true about the protocols that are used for transmitting voice traffic？（）ARTP multiplexing is used to keep multiple phone conversations separateBRTP provides end-to-end delivery services for voice trafficCUDP is used to ensure a reliable transmission from sender to receiverDRTP is used to provide resource reservation for the voice streamEUDP provides multiplexing
单选题
Which two statements are true about the protocols that are used for transmitting voice traffic？（）
A
RTP multiplexing is used to keep multiple phone conversations separate
B
RTP provides end-to-end delivery services for voice traffic
C
UDP is used to ensure a reliable transmission from sender to receiver
D
RTP is used to provide resource reservation for the voice stream
E
UDP provides multiplexing
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