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?（）

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

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

SPT初始狀態(tài)之后的一個狀態(tài)是什么？

what is the disadvantage of policing？

什么是NAT？

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 three main step of using the QoS feature with MQC command line interface？

R1 will choose which path to reach 10.1.0.0？

QoS機制中的分類，采用ip數(shù)據(jù)包中的哪個字段？