1. [单选题]What is the purpose of the spanning-tree algorithm in a switched LAN?
A. To provide a monitoring mechanism for networks in switched environments.
B. To manage VLANs across multiple switches.
C. To prevent switching loops in networks with redundant switched paths.
D. To segment a network into multiple collision domains.
E. To prevent routing loops in networks.
2. [单选题]RIP协议的管理距离是()
A. 100
B. 110
C. 120
D. 150
3. [单选题]路由器“特权模式”的提示符是:()
A. >
B.
C. (config)
D. (config-if)
4. [单选题]OSI七层模型中,“段”是哪一层数据封装的名称()
A. 物理层
B. 数据链路层(data link layer)
C. 网络层
D. 传输层
5. [单选题]帧中继环境中,CIR的含义是()
A. 提高线路速率
B. 保证线路速率
C. 降低线路速率
D. 配置线路速率
6. [单选题]OSI七层模型中,“包”是哪一层数据封装的名称()
A. 物理层
B. 数据链路层(data link layer)
C. 网络层
D. 传输层
7. [单选题]扩展ACL和标准ACL的区别()。
A. 标准的ACL在禁止和允许方面比扩展的ACL更高的精度
B. 扩展的ACL核查数据包的源地址(source address)和目标地址和端口号
C. 他们都可以查端口号
D. 他们都可以查特殊协议和其他参数
8. [单选题]把访问权限表应用到路由器端口的命令是:()
A. permit access-list 101 out
B. ip access-group 101 out
C. apply access-list 101 out
D. access-class 101 out
9. [单选题]IP地址为:192.168.50.70,掩码为:255.255.255.248,则该IP和掩码结合,共划分了多少个子网(不包括全0子网和全1子网)()
A. 8
B. 30
C. 6
D. 14
10. [单选题]Why might the Ezonexam network administrator set the configuration register to 0x2142 on a 2600 series Cisco router?
A. To boot the IOS from ROM
B. To reset the console password
C. To upload a new version of the configuration file
D. To upload a new version of the IOS
E. To allow a new memory upgrade to be recognized by the router