问题:
A . data marked with DSCP AF21,VOIP marked with DSCP EF
B . data marked with DSCP AF51,VOIP marked with DSCP EF
C . data marked with the DE-bit,VOIP marked with the CLP-bit
D . data marked with DSCP EF,VOIP marked with DSCP AF31
E . data marked with IP precedence 5 VOIP marked with DSCP EF
● 参考解析
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