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Which of the following are key characteristics of PPP?（）
Refer to the exhibit.How many broadcast domains exist in theexhibited topology？（）
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 field in IP packet is used for classification by QOS？
QoS機(jī)制中的分類，采用ip數(shù)據(jù)包中的哪個字段？
如何實(shí)現(xiàn)擁塞避免？
what is the disadvantage of policing？
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?（）
Refer to the exhibit.Which statement describes DLCI 17?（）
what is the advantage of policing opposite to shaping？