问答题
1.Best-Effort Service2.Integrated Service......
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An802.1Qtrunkisnotcomingupbetweentwoswitches.Theportson...
多项选择题An 802.1Q trunk is not coming up between two switches. The ports on both switches are configured as "switchport mode desirable." Assuming that there is no physical issue， choose two possible causes.（）
A.Incorrect VTP domain B.Incorrect VTP password C.Incorrect VTP mode D.Incorrect VTP configuration revision
YoureplacedyourLayer3switch，whichisthedefaultgatewayoft...
单项选择题You replaced your Layer 3 switch， which is the default gateway of the end users. Many users cannot access anything now， including email， Internet， and other applications， although other users do not have any issues. All of the applications are hosted in an outsourced data center. In order to fix the problem， which one of these actions should you take？（）
A.Clear the MAC address table in the switch. B.Clear the ARP cache in the switch. C.Clear the ARP cache in the end devices. D.Clear the ARP cache in the application servers.
在R2的show ip route ospf中，关于R1的loopback0的路由条目下一跳指向哪个路由器。
