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?（）

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

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

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

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？

aaa架構(gòu)中哪個(gè)是要求用戶輸入用戶名和密碼？

一堆交換機(jī)一個(gè)server、一個(gè)transpare，問配置prune在哪里配置？

QoS機(jī)制中的分類，采用ip數(shù)據(jù)包中的哪個(gè)字段？

hsrp speak狀態(tài)是什么意思？