1. [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
2. [单选题]当配置一个CISCO的路由器时,缺省的DR和BDR优先级是()。
B. 1
C. 16
D. 255
3. [单选题]在路由器上,命令show access-list的功能是()
A. 显示访问控制列表内容
B. 显示路由表内容
C. 显示端口配置信息
D. 显示活动配置文件
4. [单选题]关于帧中继(frame relay)的说法,正确的是()
A. 速率最大为1Mbit/s
B. 不提供差错校验功能
C. 可以偷占带宽
D. 数据传输质量高于DDN
5. [单选题]OSI第二层(the second layer)数据封装完成后的名称是:()
A. 比特
B. 包
C. 帧
D. 段
6. [多选题]请选出交换机处理帧的三种模式:()
A. 直通模式
B. 存储转发模式
C. 侦测模式
D. 分段模式
E. 阻塞模式
7. [单选题]IP扩展访问列表的数字标示范围是多少()。
A. 0-99
B. 1-99
C. 100-199
D. 101-200
8. [单选题]地址转换NAT的优点是()
A. 地址转换对于报文内容中含有有用的地址信息的情况很难处理
B. 地址转换可以缓解地地址短缺的问题
C. 地址转换不能处理IP报头加密的情况
D. 地址转换由于隐藏了内部主机地址,有时会使网络调试变得复杂
9. [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
10. [单选题]Given that you have a class B IP address network range, which of the subnet masks below will allow for 100 subnets with 500 usable host addresses per subnet?
A. 255.255.0.0
B. 255.255.224.0
C. 255.255.254.0
D. 255.255.255.0
E. 255.255.255.224