【名词&注释】
路由器(router)、物理层(physical layer)、一对一(one to one)、第二层(the second layer)、数据链路层(data link layer)
[单选题]为了查看路由器的E0端口上,是否挂接了访问权限表,应该使用的命令是()
A. show access-list
B. show interface e0
C. show ipinterface e0
D. show e0
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学习资料:
[单选题]关于静态NAT,下面()说法是正确的。
A. 静态NAT转换在缺省情况下24小时后超时
B. 静态NAT转换从地址池中分配
C. 静态NAT将内部地址一对一静态映射到内部全局地址
D. CISCO路由器缺省使用了静态NAT
[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
[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
[单选题]路由器上“水平分割”的功能是:()
A. 分离端口
B. 阻止路由环路
C. 简化配置
D. 方便故障处理
[单选题]On the topic of VLSM, which one of the following statements best describes the concept of the route aggregation?
A. Deleting unusable addresses through the creation of many subnets.
B. Combining routes to multiple networks into one supernet.
C. Reclaiming unused space by means of changing the subnet size.
D. Calculating the available host addresses in the AS.
E. None of the above
[多选题]The Ezonexam network administrator needs to determine what LAN devices to install on the Ezonexam network. What are two advantages of using Layer 2 Ethernet switches over hubs? (Choose two)
A. Allowing simultaneous frame. transmissions
B. Increasing the size of broadcast domains
C. Increasing the maximum length of UTP cabling between devices
D. Filtering frames based on MAC addresses
E. Decreasing the number of collision domains
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