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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?（）
Local Preference？
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?（）
When upgrading the IOS image,the network administrator receives the exhibited error message.What could be the cause of this error?（）
QoS機制中的分類，采用ip數(shù)據(jù)包中的哪個字段？
問一個怎么樣的屬性，能讓路由不通告給任何的peer？
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?（）
QoS Mechanisms：問在部署QoS中要用的3個mechanisms是什么？
aaa架構(gòu)中哪個是要求用戶輸入用戶名和密碼？