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

問一個(gè)怎么樣的屬性，能讓路由不通告給任何的peer？

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

hsrp speak狀態(tài)是什么意思？

What is method list for configure aaa？

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?（）

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

兩ebgp鄰居發(fā)路由過來(lái) ，哪些屬性重置？

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?（）

what is the advantage of policing opposite to shaping？