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?（）

兩ebgp鄰居發(fā)路由過來 ，哪些屬性重置？

what is the disadvantage of policing？

Local Preference？

What is the next state of initial in spanning-tree protocol？

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

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

QoS Mechanisms：問在部署QoS中要用的3個mechanisms是什么？

When upgrading the IOS image,the network administrator receives the exhibited error message.What could be the cause of this error?（）

hsrp speak狀態(tài)是什么意思？