【名词&注释】
路由器(router)、物理层(physical layer)、一对一(one to one)、是什么(what is)、数据链路层(data link layer)、源地址转换、快捷键(shortcut key)
[单选题]Ezonexam has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
A. VTP will allow physically redundant links while preventing switching loops
B. VTP will allow switches to share VLAN configuration information
C. VTP will allow a single port to carry information to more than one VLAN
D. VTP will allow for routing between VLANs
E. None of the above
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举一反三：
[单选题]How can a Ezonexam administrator determine if a router has been configured when it is first powered up?
A. A configured router prompts for a password
B. A configured router goes to the privileged mode prompt
C. An un configured router goes into the setup dialog
D. An un configured router goes to the enable mode prompt
[单选题]路由器当前的模式为“端口模式”，要退回到“特权模式”，应该使用的快捷键(shortcut key)为（）
A. ctrl+b
B. ctrl+z
C. ctrl+c
D. ctrl+p
[多选题]In which Spanning-Tree states does a switch port learn MAC addresses? (Select two)
A. Blocking
B. Listening
C. Forwarding
D. Learning
E. Relaying
[单选题]PPP工作在OSI的哪一层（）
A. 物理层
B. 数据链路层
C. 网络层
D. 传输层
[单选题]Cisco IOS命令ip nat inside source static 10.1.1.5 172.35.16.5的作用是什么()
A. 为所有的外部NAT创建一个全局的地址池
B. 为内部的静态地址创建动态的地址池
C. 它为所有内部本地PAT创建创建了动态源地址转换
D. 为内部本地地址和内部全局地址创建一对一的映射关系
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