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如何實(shí)現(xiàn)擁塞避免？
What is method list for configure aaa？
QoS機(jī)制中的分類，采用ip數(shù)據(jù)包中的哪個字段？
Which of the following are key characteristics of PPP?（）
four switches， which one will be root switch.（no pic）.
R1 will choose which path to reach 10.1.0.0？
Refer to the exhibit.The network administrator is in acampus building distant from Building B.WANRouter is hosting a newly installed WAN link on interface S0/0.The new link is not functioning and the administrator needs to determine if the correct cable has been attached to the S0/0 interface.How can the administrator accurately verify the correct cable type on S0/0 in the most efficient manner?（）
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?（）
SPT初始狀態(tài)之后的一個狀態(tài)是什么？
When upgrading the IOS image,the network administrator receives the exhibited error message.What could be the cause of this error?（）