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

一堆交換機一個server、一個transpare，問配置prune在哪里配置？

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 advantage of policing opposite to shaping？

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

SPT初始狀態(tài)之后的一個狀態(tài)是什么？

如何實現(xiàn)擁塞避免？

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

four switches， which one will be root switch.（no pic）.

問一個怎么樣的屬性，能讓路由不通告給任何的peer？