what is the advantage of policing opposite to shaping？

A default Frame Relay WAN is classified as what type of physical network?（）

當(dāng)將多個(gè)交換機(jī)加入到MST region當(dāng)中會(huì)發(fā)生什么（what happen）？

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

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

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

A network administrator is troubleshooting the OSPF configuration of routers R1 and R2.The routers cannot establish an adjacency relationship on their common Ethernet link.The graphic shows the output of the show ip ospf interface e0 command for routers R1 and R2.Based on the information in the graphic,what is the cause of this problem?（）

DHCP SERVER在給一個(gè)網(wǎng)段設(shè)置POOL時(shí)，該網(wǎng)段路由器接口地址能不能放入POOL，能why，不能why。

four switches， which one will be root switch.（no pic）.

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？（）