The Frame Relay network in the diagram is not functioning properly.What is the cause of the problem?（） 

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?（）

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

當將多個交換機加入到MST region當中會發(fā)生什么（what happen）？

what is the disadvantage of policing？

QoS機制中的分類，采用ip數(shù)據(jù)包中的哪個字段？

Refer to the exhibit.The network administrator is in acampus building distant from Building B.WANRouter is hosting a newly installed WAN link on interface S0/0.The new link is not functioning and the administrator needs to determine if the correct cable has been attached to the S0/0 interface.How can the administrator accurately verify the correct cable type on S0/0 in the most efficient manner?（）

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

一堆交換機一個server、一個transpare，問配置prune在哪里配置？

what is four ospf area type？