hsrp speak狀態(tài)是什么意思？

aaa架構(gòu)中哪個(gè)是要求用戶輸入用戶名和密碼？

Which of the following describes the roles of devices in a WAN?（）

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

Local Preference？

what is four ospf area type？

SPT初始狀態(tài)之后的一個(gè)狀態(tài)是什么？

問一個(gè)怎么樣的屬性，能讓路由不通告給任何的peer？

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

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?（）