VoIP bearer traffic is typically marked to which DSCP value？（）A、cs3B、cs7C、efD、af41E、af31F、0（default）
VoIP bearer traffic is typically marked to which DSCP value？（）
- A、cs3
- B、cs7
- C、ef
- D、af41
- E、af31
- F、0（default）
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