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

what is the advantage of policing opposite to shaping？

如何實現(xiàn)擁塞避免？

QoS機制中的分類，采用ip數(shù)據(jù)包中的哪個字段？

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

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

DHCP SERVER在給一個網(wǎng)段設(shè)置POOL時，該網(wǎng)段路由器接口地址能不能放入POOL，能why，不能why。

hsrp speak狀態(tài)是什么意思？

What is the next state of initial in spanning-tree protocol？

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