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？（）

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

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

什么是NAT？

what is four ospf area type？

hsrp speak狀態(tài)是什么意思？

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?（）

如何實現(xiàn)擁塞避免？

The following configuration line was added to router R1 Access-list 101 permit ip 10.25.30.00.0.0.255 any What is the effect of this access list configuration?（）

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