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?（）

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？

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

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

what is four ospf area type？

aaa架構(gòu)中哪個是要求用戶輸入用戶名和密碼？

As a CCNA candidate,you must have a firm understanding of the IPv6 address structure.Refer to IPv6 address,could you tell me how many bits are included in each filed?（）

what is the advantage of policing opposite to shaping？

Local Preference？