Users report an intermittent degradation of sound on their IP phones. Which of the following woulda network administrator do to alleviate the problem?（）A、Use plenum cablesB、Provide fault tolerance for the switchC、Configure VLAN trunking on the switchD、Configure QoS
Users report an intermittent degradation of sound on their IP phones. Which of the following woulda network administrator do to alleviate the problem?（）
- A、Use plenum cables
- B、Provide fault tolerance for the switch
- C、Configure VLAN trunking on the switch
- D、Configure QoS
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