单选题
Refer to the exhibit. Based upon the information that is given， how will voice traffic from the phone and data traffic from the PC be handled by SW_1？ （） 
发布日期：2021-01-28
The switch port will perform marking for the ingress voice and data traffic by using the defaultCoS value at the switch port.
The switch port will trust theCoS value of the ingress voice and data traffic that comes into the switch port.
The switch port will trust theCoS value of the ingress voice traffic. Data traffic will be marked at the switch port with the default CoS value.
The switch port will trust theCoS value of the ingress data traffic. Voice traffic will be marked at the switch port with the default CoS value.
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