Which three traffic descriptors are typically used as QoS markings for packets or frames entering the network？（）A、protocol typeB、CoSC、DSCPD、IP precedenceE、destination addressF、input interface
Which three traffic descriptors are typically used as QoS markings for packets or frames entering the network？（）
- A、protocol type
- B、CoS
- C、DSCP
- D、IP precedence
- E、destination address
- F、input interface
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