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“路由和交换”自我水平测试评估(1级)Part B

2013-02-14 12:39 204 查看
[align=left]11. [/align][align=left]Which two of these are part of the TCP/IP protocol stack? (Choose two.)application layersession layerInternet layerpresentation layernetwork access layer[/align]
[align=left]11. 以下哪两项是TCP/IP协议堆栈的一部分?(选择两项。)[/align]
[align=left]应用层[/align]
[align=left]会话层[/align]
[align=left][/align][align=left]互联网层[/align]
[align=left]表示层[/align]
[align=left][/align][align=left]网络接入层[/align]
[align=left]12. [/align][align=left]During path selection, which three of these metrics may be used by routing protocols? (Choose three.)DelayWeightDirectionhop countBandwidthMED [/align]
[align=left]12. 在路径选择过程中,路由协议可能会使用这些标准中的哪三个?(选择三项。)[/align]
[align=left][/align][align=left]延迟[/align]
[align=left]权重[/align]
[align=left]方向[/align]
[align=left][/align][align=left]跳数[/align]
[align=left][/align][align=left]带宽[/align]
[align=left]MED[/align]
[align=left]13. [/align][align=left]What is the high-order bit pattern for a Class A network?01xxxxxx111xxxxx10xxxxxx0xxxxxxx[/align]
[align=left]13. Class A网络的高位模式是什么?[/align]
[align=left]01xxxxxx[/align]
[align=left]111xxxxx[/align]
[align=left]10xxxxxx[/align]
[align=left][/align][align=left]0xxxxxxx[/align]
[align=left]14. [/align][align=left]Which of these best describes “flooding” as it refers to switches?If the switch does not have an entry for the destination address, it will transmit the frame out of all ports except the port on which it received the frame.If the switch determines that the destination MAC address of the frame resides on the same network segment as the source, it does not forward the frame.If the switch determines that the destination MAC address of the frame is not from the same network as the source, it transmits the frame to the appropriate segment.When a denial of service attack occurs, it causes a switch’s CAM table to become fully populated. [/align]
[align=left]14. 以下那一项恰当地描述了交换机泛洪flooding)操作?[/align]
[align=left][/align][align=left]如果交换机中没有针对目标地址的记录,它将向所有端口传输该数据帧,数据帧的来源端口除外。[/align]
[align=left]如果交换机确定数据帧的目标MAC地址位于同来源端口相同的网段,它不会转发数据帧。[/align]
[align=left]如果交换机确定数据帧的目标MAC地址与来源端口的网络不同,它将向相关网段传输该数据帧。[/align]
[align=left]当拒绝服务攻击发生时,它会导致交换机的CAM表被写满。[/align]
[align=left]15. [/align][align=left]How many frames can pass through a 24-port switch simultaneously, without causing a collision and with full duplex used on all ports?1816243264[/align]
[align=left]15. 在一个24端口交换机上,当所有端口均启用全双工支持时,在不产生冲突的情况下最多可以同时通过多少个帧?[/align]
[align=left]1[/align]
[align=left]8[/align]
[align=left]16[/align]
[align=left][/align][align=left]24[/align]
[align=left]32[/align]
[align=left]64[/align]
[align=left]16. [/align][align=left]How many frames can pass through a 24-port hub simultaneously, without causing a collision?OneTwoFourEight[/align]
[align=left]16. 在不产生冲突的情况下,一个24端口集线器能够同时通过多少个帧?[/align]
[align=left][/align][align=left]1[/align]
[align=left]2[/align]
[align=left]4[/align]
[align=left]8[/align]
[align=left]17. [/align][align=left]According to RFC 1918, which two of these addresses are considered private addresses? (Choose two.)10.12.21.118.24.7.245172.16.34.18172.47.88.89212.45.22.12[/align]
[align=left]17. 根据RFC 1918,以下哪两个地址属于私有地址?(选择两项。)[/align]
[align=left][/align][align=left]10.12.21.1[/align]
[align=left]18.24.7.245[/align]
[align=left][/align][align=left]172.16.34.18[/align]
[align=left]172.47.88.89[/align]
[align=left]212.45.22.12[/align]
[align=left]18. [/align][align=left]What kind of physical interface does a router use to connect to a WAN link?Ethernethost bus adapterparallel interfaceserial interface[/align]
[align=left]18. 路由器使用哪一类物理接口与广域网链路进行连接?[/align]
[align=left]以太网[/align]
[align=left]主机总线适配器[/align]
[align=left]并行接口[/align]
[align=left][/align][align=left]串行接口[/align]
[align=left]19. [/align][align=left]How many TCP segments flow between two computers to establish a TCP connection?OneTwoThreeFivedepends on what the TCP window size is set to[/align]
[align=left]19. 两台计算机之间需要传输多少TCP段才能建立一个TCP连接?[/align]
[align=left][/align][align=left]一个[/align]
[align=left]两个[/align]
[align=left]三个[/align]
[align=left]五个[/align]
[align=left]取决于设定的TCP窗口大小[/align]
[align=left]20. [/align][align=left]Imagine that you visit a website and download a graphic image called logo.gif. The logo is 4000 bytes. Assuming an MSS of 1480 bytes, how many segments will the server send back to your browser to send you the logo?2 segments3 segments4 segments5 segments10 segments[/align]
[align=left]20. 假设您正在访问一个网站,要下载一个名为logo.gif的图片。该标识的大小为4,000字节。假定MSS值为1480字节,服务器需要向您的浏览器返回多少个片段以向您发送该标识?[/align]
[align=left]2个片段[/align]
[align=left][/align][align=left]3个片段[/align]
[align=left]4个片段[/align]
[align=left]5个片段[/align]
[align=left]10个片段[/align]
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