1. [单选题]The Ezonexam network administrator has issued the "VTP password ezonexam" command on a Cisco device. What is the purpose of this command?
A. It allows two VTP servers to exists in the same domain, each configured with different passwords
B. It is the password required when promoting a switch from VTP client mode to VTP server mode
C. It is used to access the VTP server to make changes to the VTP configuration
D. It is used to validate the sources of VTP advertisements sent between switches
E. None of the above
2. [单选题]OSI七层模型中，网络层的数据封装名称为（）
A. 比特
B. 帧
C. 包
D. 段
3. [单选题]对于运行OSPF协议的路由器来说，RouterID是路由器的唯一标识，所以协议规定：必须保证RouterID在如下范围之内唯一（）。
A. 网段内
B. 区域内
C. 自治系统内
D. 整个因特网
4. [单选题]You wish to segment your LAN into multiple broadcast domains. Which technology method should you implement in order to do this?
A. Transparent bridging
B. Cut-through switching
C. Fragment-free switches
D. Virtual LANs
E. Store-and-forward switching
F. F. None of the above
5. [多选题]在路由器上，可以使用的命令有：()
A. ping
B. show interfaces
C. show ip route
D. ipconfig
E. wincfg
