多选题What are two major sources of delay that can be managed by QoS in voice-enabled networks？（）Apropagation delayBvoice packet serialization delayCcongested egress queuesDheader overheadEpackets dropped because of CRC errors
多选题
What are two major sources of delay that can be managed by QoS in voice-enabled networks？（）
A
propagation delay
B
voice packet serialization delay
C
congested egress queues
D
header overhead
E
packets dropped because of CRC errors
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