Which of the following are key characteristics of PPP?（）

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?（）

當(dāng)將多個(gè)交換機(jī)加入到MST region當(dāng)中會(huì)發(fā)生什么（what happen）？

兩ebgp鄰居發(fā)路由過來 ，哪些屬性重置？

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

The Frame Relay network in the diagram is not functioning properly.What is the cause of the problem?（） 

什么問題導(dǎo)致SERVER VTP密碼跟替他交換機(jī)VTP密碼不匹配？

什么是NAT？

QoS機(jī)制中的分類，采用ip數(shù)據(jù)包中的哪個(gè)字段？

What is method list for configure aaa？