four switches， which one will be root switch.（no pic）.

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

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

Refer to the exhibit.Which statement describes DLCI 17?（）

What is method list for configure aaa？

what is the disadvantage of policing？

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?（）

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

兩ebgp鄰居發(fā)路由過來 ，哪些屬性重置？

Local Preference？