如何實現(xiàn)擁塞避免？

what is four ospf area type？

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

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?（）

Refer to the exhibit.How many broadcast domains exist in theexhibited topology？（）

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

問一個怎么樣的屬性，能讓路由不通告給任何的peer？

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

QoS Mechanisms：問在部署QoS中要用的3個mechanisms是什么？

what is the disadvantage of policing？