多选题Which three QoS mechanisms can be configured to improve VoIP quality on a converged network？（）AThe use of a queuing method that will give VoIP traffic strict priority over other trafficBThe use of RTP header compression for the VoIP traffic.CThe proper classification and marking of the traffic as close to the source as possibleDThe use of 802.1QinQ trunking for VoIP trafficEThe use of WRED for the VoIP traffic
多选题
Which three QoS mechanisms can be configured to improve VoIP quality on a converged network？（）
A
The use of a queuing method that will give VoIP traffic strict priority over other traffic
B
The use of RTP header compression for the VoIP traffic.
C
The proper classification and marking of the traffic as close to the source as possible
D
The use of 802.1QinQ trunking for VoIP traffic
E
The use of WRED for the VoIP traffic
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