what is the advantage of policing opposite to shaping？

When upgrading the IOS image,the network administrator receives the exhibited error message.What could be the cause of this error?（）

What is the three main step of using the QoS feature with MQC command line interface？

Refer to the exhibit.How many broadcast domains exist in theexhibited topology？（）

Refer to the exhibit.What is the meaning of the term dynamic as displayed in the output of the show frame-relay map command shown？（）

What field in IP packet is used for classification by QOS？

what is four ospf area type？

Which of the following describes the roles of devices in a WAN?（）

What is method list for configure aaa？

QoS Mechanisms：問在部署QoS中要用的3個mechanisms是什么？