1. [单选题]OSI第二层数据封装完成后的名称是：()
A. 比特
B. 包
C. 帧
D. 段
2. [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
3. [单选题]Which type of cable should be used to make a connection between the Fa0/0 port on a router and the Fa0/0 port switch?
A. Rollover cable
B. Console cable
C. Crossover cable
D. Straight-through cable
E. Serial cable
4. [单选题]TELNET工作在OSI哪一层（）
A. 会话层
B. 表示层
C. 传输层
D. 应用层
5. [单选题]When is a switched network that is running the Spanning Tree Protocol considered to be fully converged?
A. when all switches have the same BID as the root switch
B. when all switches have received the MAC address of each neighboring switch
C. when every enabled switch port has been assigned a unique identifier
D. when every operating switch port is in either the blocking or forwarding state
E. when all switches are in either client, server, or transparent mode
