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紅字什么意思？
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How should arouter that is being used in a Frame Relay network be configured to avoid split horizon issues from preventing routing updates?（）
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？
R1 will choose which path to reach 10.1.0.0？
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?（）
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?（）
什么是NAT？
如何實現(xiàn)擁塞避免？
兩ebgp鄰居發(fā)路由過來 ，哪些屬性重置？
QoS機制中的分類，采用ip數(shù)據(jù)包中的哪個字段？