
【名词&注释】
互联网(internet)、帧中继(frame relay)、第二层(the second layer)、源地址(source address)
[单选题]为了使配置私有IP的设备能够访问互联网,应采用的技术是()
A. NAT
B. VLAN
C. ACCESS-LIST
D. DDR
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举一反三:
[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
[单选题]The Ezonexam network administrator needs to a switch named VE1 to become the root bridge for a redundant path switched network. What can be done to ensure that VE1 will always assume the role as the root bridge?
A. Assign the switch a higher MAC address than the other switches in the network have
B. Establish a direct link from the switch to all other switches in the network
C. Configure the switch full-duplex operation and configure the other switches for half-duplex operation
D. Configure the switch so that it has lower priority than other switches in the network
E. None of the above
[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
[单选题]访问控制列表分为标准和扩展两种。下面关于ACL的描述中,错误的是()。
A. 标准ACL可以根据分组中的IP源地址(source address)进行过滤
B. 扩展ACL可以根据分组中的IP目标地址进行过滤
C. 标准ACL可以根据分组中的IP目标地址进行过滤
D. 扩展ACL可以根据不同的上层协议信息进行过滤
[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]Assuming you build networks to exact specifications, what is the recommended maximum length a 10BaseT cable can be before it has to be segmented or repeated?
A. 100 meters
B. 100 feet
C. 100 yards
D. 200 meters
E. None of the above
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