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

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

R1 will choose which path to reach 10.1.0.0？

如何實現(xiàn)擁塞避免？

aaa架構中哪個是要求用戶輸入用戶名和密碼？

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

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

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

Local Preference？

hsrp speak狀態(tài)是什么意思？