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

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？

The following configuration line was added to router R1 Access-list 101 permit ip 10.25.30.00.0.0.255 any What is the effect of this access list configuration?（）

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?（）

DHCP SERVER在給一個(gè)網(wǎng)段設(shè)置POOL時(shí)，該網(wǎng)段路由器接口地址能不能放入POOL，能why，不能why。

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

Local Preference？

什么問(wèn)題導(dǎo)致SERVER VTP密碼跟替他交換機(jī)VTP密碼不匹配？

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