单选题Rewrite rules are used in which CoS scenario?（）AWhen a single device is configured to provide differentiated services.BWhen multiple devices in a network are configured to use CoS to provide differentiated services.CWhen a device is used to connect to another autonomous system.DWhen CoS is used to classifiy traffic as low priority.
单选题
Rewrite rules are used in which CoS scenario?（）
A
When a single device is configured to provide differentiated services.
B
When multiple devices in a network are configured to use CoS to provide differentiated services.
C
When a device is used to connect to another autonomous system.
D
When CoS is used to classifiy traffic as low priority.
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