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📁 网络工程师试题对你一定会用帮助
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    <TD align=left height=212 width=607>&nbsp; &nbsp; 
      与线路交换相比,分组交换最大的优点是__(11)__&copy;) <BR>答: &nbsp;<INPUT class=radio name=text1661 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=A>A.延迟时间小<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1661 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=B>B.可进行差错控制<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1661 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=C>C.缓冲区易于管理<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1661 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=D>D.便于标准化<BR></TD></TR>
  <TR class=trh1>
    <TD align=middle height=212 width=29>30 </TD>
    <TD align=left height=212 width=607>&nbsp; &nbsp; 与线路交换相比,最大的缺点是__(12)__&copy;) 
      <BR>答: &nbsp;<INPUT class=radio name=text1663 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=A>A.增大延迟<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1663 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=B>B.不能实现链路共享<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio 
      name=text1663 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=C>C.不能实现速率转换<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio 
      name=text1663 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=D>D.不能满足实时应用要求<BR></TD></TR>
  <TR class=trh1>
    <TD align=middle height=212 width=29>31 </TD>
    <TD align=left height=212 width=607>&nbsp; &nbsp; 与线路交换相比,设待传送数据总长度为 L 
      位分组长度为 P 位,其中头部开销长度为 H 位,源节点到目 的节点之间的链路数为 h,每个键路上的延迟时间为 D 秒,数据传输率为 B 
      bps,线路交换和虚电路建立连接的时间都为 S 秒,在分组交换方式下每个中间节点产生 d 
      位的延迟时间,则传送所有数据,虚电路分组交换所需时间为__(14)__秒&copy;) <BR>答: &nbsp;<INPUT class=radio 
      name=text1667 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=A>A.S+(hd/B+P/B)*[L/(P-H)]<BR>&nbsp; &nbsp; &nbsp; <INPUT 
      class=radio name=text1667 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=B>B.S+(hD+P/B)*[L/(P-H)]<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio 
      name=text1667 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio value=C>C. 
      S+[(h-1)D+P/B]*[L/(P-H)]<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio 
      name=text1667 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=D>D.S+[(h-1)d/B+hD+P/B]*{L/(P-H)]<BR></TD></TR>
  <TR class=trh1>
    <TD align=middle height=212 width=29>32 </TD>
    <TD align=left height=212 width=607>&nbsp; &nbsp; 
      透明网桥的基本功能有学习、帧过滤和帧转发及生成树算法等功能,因此它可以决定网络中的路由,而网络中的各个站点均不负责路由选择。网桥从其某一端口收到正确的数据帧后,在其地址转发表中查找该帧要到达的目的站,若查找不到,则会__(16)__&copy;) 
      <BR>答: &nbsp;<INPUT class=radio name=text1671 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=A>A.向除该端口以外的桥的所有端口转发此帧<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio 
      name=text1671 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=B>B.向桥的所有端口转发此帧<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio 
      name=text1671 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=C>C.仅向该端口转发此帧<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio 
      name=text1671 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=D>D.不转发此帧,而由桥保存起来<BR></TD></TR>
  <TR class=trh1>
    <TD align=middle height=212 width=29>33 </TD>
    <TD align=left height=212 width=607>&nbsp; &nbsp; 
      透明网桥的基本功能有学习、帧过滤和帧转发及生成树算法等功能,因此它可以决定网络中的路由,而网络中的各个站点均不负责路由选择。网桥从其某一端口收到正确的数据帧后,在其地址转发表中查找该帧要到达的目的站,若要到达的目的站仍然在该端口上,则会___(17)__。&copy;) 
      <BR>答: &nbsp;<INPUT class=radio name=text1673 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=A>A.向该端口转发此帧<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio 
      name=text1673 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=B>B.丢弃此帧<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1673 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=C>C.将此帧作为地址探测帧<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio 
      name=text1673 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio value=D>D. 
      利用此帧建立该端口的地址转换表<BR></TD></TR>
  <TR class=trh1>
    <TD align=middle height=212 width=29>34 </TD>
    <TD align=left height=212 width=607>&nbsp; &nbsp; 图一为两个局域网 LAN1 和 LAN2 
      通过网桥 1 和网桥 2 互连后形成的网络结构。设站 A 
      发送一个帧,但其目的地址均不在这两个网桥的地址转发表中,为了有效地解决该类问题,可以在每个网桥中引入生成树算法,这样一来__(19)__。 &copy;) 
      <BR>
      <CENTER><IMG border=0 src="模拟考试19.files/200481394349wso3x8.gif"> 
      </CENTER><BR>答: &nbsp;<INPUT class=radio name=text1679 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=A>A.网络资源也会得到充分利用<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio 
      name=text1679 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=B>B.网络的最佳路由也会得到确定<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio 
      name=text1679 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=C>C.也限制了网络规模<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio 
      name=text1679 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=D>D.也增加了网络延时<BR></TD></TR>
  <TR class=trh1>
    <TD align=middle height=212 width=29>35 </TD>
    <TD align=left height=212 width=607>&nbsp; &nbsp; 图二为一 10Mbps 
      数据传输率下的以太网,其上连接有 10 
      个站,在理想状态下每个站的平均数据传输率为1Mbps。若通过网桥连接后成为图三所示的结构时,每个站的实际有效数据传输率为__(20)__Mbps。 
      &copy;) <BR>
      <CENTER><IMG border=0 src="模拟考试19.files/200481394623wso3x9.gif"> 
      </CENTER><BR>答: &nbsp;<INPUT class=radio name=text1682 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio value=A>A.1 
      至 2<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1682 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=B>B.1<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1682 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=C>C.2<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1682 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio value=D>D.0 
      至 1<BR></TD></TR>
  <TR class=trh1>
    <TD align=middle height=212 width=29>36 </TD>
    <TD align=left height=212 width=607>&nbsp; &nbsp; 对照 ISO/OSI 
      参考模型各个层中的网络安全服务,在数据链路层,可以采用__(27)__进行链路加密&copy;) <BR>答: &nbsp;<INPUT 
      class=radio name=text1694 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=A>A.公钥基础<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1694 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=B>B.Kerberos 鉴别<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio 
      name=text1694 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=C>C.通信保密机 <BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1694 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio value=D>D.CA 
      认证中心<BR></TD></TR>
  <TR class=trh1>
    <TD align=middle height=212 width=29>37 </TD>
    <TD align=left height=212 width=607>&nbsp; &nbsp; 对照 ISO/OSI 
      参考模型各个层中的网络安全服务,在传输层主要解决进程到进程间的加密,最常见的传输层安全技术有__(29)__&copy;) <BR>答: 
      &nbsp;<INPUT class=radio name=text1699 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=A>A.SET<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1699 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=B>B.IPsec<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1699 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=C>C.S-HTTP<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1699 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=D>D.SSL <BR></TD></TR>
  <TR class=trh1>
    <TD align=middle height=212 width=29>38 </TD>
    <TD align=left height=212 width=607>&nbsp; &nbsp; N-ISDN 
      是在__(41)__基础上建立起来的网络&copy;) <BR>答: &nbsp;<INPUT class=radio name=text1721 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=A>A.电话网<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1721 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=B>B.有线电视网<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1721 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=C>C.公用数据网<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1721 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=D>D.接入网<BR></TD></TR>
  <TR class=trh1>
    <TD align=middle height=212 width=29>39 </TD>
    <TD align=left height=212 width=607>&nbsp; &nbsp; 
      N-ISDN一路话音占用的数据传输率是__(44)__&copy;) <BR>答: &nbsp;<INPUT class=radio 
      name=text1726 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=A>A.3KHz<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1726 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=B>B.3.4KHz<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1726 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=C>C.64Kbps<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1726 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=D>D.128Kbps <BR></TD></TR>
  <TR class=trh1>
    <TD align=middle height=212 width=29>40 </TD>
    <TD align=left height=212 width=607>&nbsp; &nbsp; 当使用 RS232C 
      连接相关设备时,电缆的长度不应超过__(48)__米。&copy;) <BR>答: &nbsp;<INPUT class=radio 
      name=text1727 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=A>A.3<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1727 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=B>B.12<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1727 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=C>C.15<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1727 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=D>D.50<BR></TD></TR>
  <TR class=trh1>
    <TD align=middle height=212 width=29>41 </TD>
    <TD align=left height=212 width=607>&nbsp; &nbsp; 当计算机需要通过相连的 MORDEM 
      发送数据时,依次设置的信号是__(50)__。&copy;) <BR>答: &nbsp;<INPUT class=radio name=text1957 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=A>A.MODEM就绪→ 
      DTE就绪→请求发送→允许发送→发数据→清请求发送→清允许发送→清MODEM就绪→清DTE就绪<BR>&nbsp; &nbsp; &nbsp; 
      <INPUT class=radio name=text1957 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 

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