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

QoS機(jī)制中的分類，采用ip數(shù)據(jù)包中的哪個(gè)字段？

Local Preference？

what is the advantage of policing opposite to shaping？

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

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？（）

SPT初始狀態(tài)之后的一個(gè)狀態(tài)是什么？

Refer to the exhibit.The network administrator is in acampus building distant from Building B.WANRouter is hosting a newly installed WAN link on interface S0/0.The new link is not functioning and the administrator needs to determine if the correct cable has been attached to the S0/0 interface.How can the administrator accurately verify the correct cable type on S0/0 in the most efficient manner?（）

aaa架構(gòu)中哪個(gè)是要求用戶輸入用戶名和密碼？

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