what is the disadvantage of policing？

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

what is four ospf area type？

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

How should arouter that is being used in a Frame Relay network be configured to avoid split horizon issues from preventing routing updates?（）

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

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

什么問題導(dǎo)致SERVER VTP密碼跟替他交換機VTP密碼不匹配？

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

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?（）