单项选择题

Refer to the exhibit. The auto discovery qos command wa……

Refer to the exhibit. The auto discovery qos command was configured on this interface 24 hours prior to the above configuration. Which statement is true about the configuration?（）

A. An IP address is needed on interface seriall/2.
B.The auto discovery qos command should be configured on the subinterface
C.A generated AutoOoS policy has been applied to serial1/2.
D.The collection of data has stopped.

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单项选择题Identifythelinkefficiencymechanism？（）

A.LFI
B.LLQ
C.RSVP
D.WFO
E.WRED

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A.The PRI field should contain the Cos value of 010
B.The PRI field should contain the Cos value of 011
C.The PRI field should contain the Cos value of 100
D.The PRI field should contain the Cos value of 101
E.The PRI field should contain the Cos value of 110
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A.protection against denial of service （DoS） attacks at infrastructure routers and switches
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C.WLSE can pick up statistics on a device even if the device is not properly configured.
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