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?（）

what is the disadvantage of policing？

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

What is the three main step of using the QoS feature with MQC command line interface？

问一个怎么样的属性，能让路由不通告给任何的peer？

aaa架构中哪个是要求用户输入用户名和密码？

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?（）

一堆交换机一个server、一个transpare，问配置prune在哪里配置？

两ebgp邻居发路由过来 ，哪些属性重置？

如何实现拥塞避免？