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QoS機(jī)制中的分類，采用ip數(shù)據(jù)包中的哪個(gè)字段？
How should arouter that is being used in a Frame Relay network be configured to avoid split horizon issues from preventing routing updates?（）
一堆交換機(jī)一個(gè)server、一個(gè)transpare，問(wèn)配置prune在哪里配置？
QoS Mechanisms：?jiǎn)栐诓渴餛oS中要用的3個(gè)mechanisms是什么？
When upgrading the IOS image,the network administrator receives the exhibited error message.What could be the cause of this error?（）
A default Frame Relay WAN is classified as what type of physical network?（）
Which of the following describes the roles of devices in a WAN?（）
Refer to the exhibit.What is the meaning of the term dynamic as displayed in the output of the show frame-relay map command shown？（）
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?（）
Which of the following are key characteristics of PPP?（）