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?（）

aaa架構(gòu)中哪個(gè)是要求用戶(hù)輸入用戶(hù)名和密碼？

How should arouter that is being used in a Frame Relay network be configured to avoid split horizon issues from preventing routing updates?（）

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?（）

兩ebgp鄰居發(fā)路由過(guò)來(lái) ，哪些屬性重置？

What field in IP packet is used for classification by QOS？

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）？

什么是NAT？

A default Frame Relay WAN is classified as what type of physical network?（）

What is the next state of initial in spanning-tree protocol？