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📁 网络工程师试题对你一定会用帮助
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      onfocus="this.className='inputedit';this.select()" type=radio 
      value=C>C.有噪声信道与无噪声信道没有可比性<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio 
      name=text1655 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=D>D.上述值都为极限值,条件不同,不能进行直接的比较<BR></TD></TR>
  <TR class=trh1>
    <TD align=middle height=212 width=29>28 </TD>
    <TD align=left height=212 width=607>&nbsp; &nbsp; 根据奈奎斯特第一定理,为了保证传输质量,为达到 
      3KbpS 的数据传输车需要的带宽为___(9)___。&copy;) <BR>答: &nbsp;<INPUT class=radio 
      name=text1657 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=A>A.3KHz<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1657 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=B>B.6KHz<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1657 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=C>C.2KHz<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1657 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=D>D.56KHz<BR></TD></TR>
  <TR class=trh1>
    <TD align=middle height=212 width=29>29 </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,线路交换需时间为__(13)__秒&copy;) <BR>答: &nbsp;<INPUT class=radio 
      name=text1665 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=A>A.hD+L/B<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1665 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=B>B.S+hD+L/P<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio 
      name=text1665 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=C>C.S+hD+L/B<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio 
      name=text1665 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=D>D.S+L/B<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,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,数据报分组交换所需时间为__(15)__秒。&copy;) <BR>答: &nbsp;<INPUT class=radio 
      name=text1669 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio value=A>A. 
      (hd/B+P/B)*[L/(P-H)]<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio 
      name=text1669 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=B>B.(hD+P/B)*[L/(P-H)] <BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio 
      name=text1669 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=C>C.[(h-1)d/B+hD+P/B]*[L/(P-H)]<BR>&nbsp; &nbsp; &nbsp; <INPUT 
      class=radio name=text1669 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio value=D>D. 
      [(h-1)d/B+hD+P/B]*[L/P]<BR></TD></TR>
  <TR class=trh1>
    <TD align=middle height=212 width=29>31 </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>32 </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,这样结果会是该帧__(18)__。&copy;) <BR>
      <CENTER><IMG border=0 src="模拟考试22.files/200481394246wso3x8.gif"> 
      </CENTER><BR>答: &nbsp;<INPUT class=radio name=text1675 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio value=A>A.经桥 
      1(或桥 2)后被站 B 接收<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1675 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio value=B>B.被桥 
      1(或桥 2 )丢弃<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1675 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=C>C.在整个网络中无限次地循环下去<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio 
      name=text1675 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio value=D>D.经桥 
      1 ( 或桥 2 )到达 LAN2,再经桥 2 ( 或桥 1 )返回 LAN1 后被站 A 吸收<BR></TD></TR>
  <TR class=trh1>
    <TD align=middle height=212 width=29>33 </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22.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>34 </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>35 </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,在网络层可以采用__(28)__来处理信息内外网络边界流动和建立透明的安全加密信道&copy;) <BR>答: 
      &nbsp;<INPUT class=radio name=text1697 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=A>A.防窃听技<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1697 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=B>B.防火墙技术<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1697 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=C>C.防病毒技术<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1697 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=D>D.防拒认技术<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>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,为了将低层安全服务进行抽象和屏蔽,最有效的一类做法是可以在传输层和应用层之间建立中间件层次实现通用的安全服务功能,通过定义统一的安全服务接口向应用层提供__(30)__安全服务。&copy;) 
      <BR>答: &nbsp;<INPUT class=radio name=text1701 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=A>A.身份认证<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1701 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=B>B.访问控制 <BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1701 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=C>C.身份认证、访问控制和数据加密<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio 
      name=text1701 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=D>D.数据加密<BR></TD></TR>
  <TR class=trh1>
    <TD align=middle height=212 width=29>38 </TD>
    <TD align=left height=212 width=607>&nbsp; &nbsp; SNMP 
      协议管理操作中管理代理主动向管理进程报告事件的操作是__(38)__。&copy;) <BR>答: &nbsp;<INPUT class=radio 
      name=text1715 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=A>A.get-request<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio 
      name=text1715 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=B>B.get-response<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio 
      name=text1715 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=C>C.trap<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1715 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=D>D.set-request<BR></TD></TR>
  <TR class=trh1>
    <TD align=middle height=212 width=29>39 </TD>
    <TD align=left height=212 width=607>&nbsp; &nbsp; 在 ISO OSI/RM 
      基础上的公共管理信息服务/公共管理信息协议 CMIS/CMIP 是一个完整的网络管理协议族,网络管理应用进程使用 OSI 
      参考模型的__(39)__。&copy;) <BR>答: &nbsp;<INPUT class=radio name=text1717 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=A>A.网络层<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1717 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=B>B.传输层<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1717 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 

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