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

如何實現擁塞避免？

What is method list for configure aaa？

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

SPT初始狀態(tài)之后的一個狀態(tài)是什么？

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

R1 will choose which path to reach 10.1.0.0？

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

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

兩ebgp鄰居發(fā)路由過來 ，哪些屬性重置？