Local Preference？

what is four ospf area type？

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

Which of the following are key characteristics of PPP?（）

what is the advantage of policing opposite to shaping？

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

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？

hsrp speak狀態(tài)是什么意思？

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