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

aaa架構(gòu)中哪個是要求用戶輸入用戶名和密碼？

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

如何實現(xiàn)擁塞避免？

問一個怎么樣的屬性，能讓路由不通告給任何的peer？

what is the advantage of policing opposite to shaping？

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

what is four ospf area type？

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

When upgrading the IOS image,the network administrator receives the exhibited error message.What could be the cause of this error?（）