what is the disadvantage of policing？

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

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

hsrp speak狀態(tài)是什么意思？

How should arouter that is being used in a Frame Relay network be configured to avoid split horizon issues from preventing routing updates?（）

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?（）

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。

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?（）

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

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