问题:
A . the auto discovery qos command is supported on serial interfaces, subinterfaces, and virtual interfaces
B . CEF must be enabled before configuring the auto discovery qos command
C . the auto discovery qos privilege EXEC command must be configured on a router for several days to collect a sampling of data traffic
D . the auto qos trust command relies on NBAR to provide VoIP classification
E . the auto qos voip command configures the voip classification on routers and switche
● 参考解析
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