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📁 网络工程师试题对你一定会用帮助
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      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=C>C.20<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1645 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=D>D.24<BR></TD></TR>
  <TR class=trh1>
    <TD align=middle height=212 width=29>29 </TD>
    <TD align=left height=212 width=607>&nbsp; &nbsp; 设有某一个令牌环网长度为 400 米,环上有 
      28 个站点,其数据传输率为 4MbpS,环上信号的传播速度为 200 米/μS,每个站点具有 1bit 时延,则环上可能存在的最大时延是&copy;) 
      <BR>答: &nbsp;<INPUT class=radio name=text1647 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=A>A.9<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1647 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=B>B.28<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1647 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=C>C.36<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1647 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=D>D.48<BR></TD></TR>
  <TR class=trh1>
    <TD align=middle height=212 width=29>30 </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>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>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9.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; 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>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,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>35 </TD>
    <TD align=left height=212 width=607>&nbsp; &nbsp; TCP 
      是一个面向连接的协议,它提供连接的功能是__(31)__的&copy;) <BR>答: &nbsp;<INPUT class=radio 
      name=text1703 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio value=A>A. 
      全双工<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1703 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=B>B.半双工<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1703 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=C>C.单工<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1703 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=D>D.单方向<BR></TD></TR>
  <TR class=trh1>
    <TD align=middle height=212 width=29>36 </TD>
    <TD align=left height=212 width=607>&nbsp; &nbsp; TCP 
      是一个面向连接的协议,为了提高效率,又引入了滑动窗口协议,协议规定重传__(33)__的分组&copy;) <BR>答: &nbsp;<INPUT 
      class=radio name=text1708 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=A>A.未被确认及至窗口首端的所有分<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio 
      name=text1708 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=B>B.未被确认<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio name=text1708 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=C>C.未被确认及至退回N值的所有分组<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio 
      name=text1708 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=D>D.仅丢失的<BR></TD></TR>
  <TR class=trh1>
    <TD align=middle height=212 width=29>37 </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>38 </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 
      value=B>B.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DTE就绪→清MODEM就绪<BR>&nbsp; 
      &nbsp; &nbsp; <INPUT class=radio name=text1957 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=C>C.DTE就绪→MODEM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 
      value=D>D.DTE就绪→MODEM就绪→请求发送→允许发送→发数据→清请求发送→清允许发送→清DTE就绪→清MODEM就绪<BR></TD></TR>
  <TR class=trh1>
    <TD align=middle height=212 width=29>39 </TD>
    <TD align=left height=212 width=607>&nbsp; &nbsp; 配置 WWW 服务器是 UNIX 
      操作平台的重要工作之一,而 Apach 目前是应用最为广泛的 Web 服务器产品之一,__(56)__是 apache 的主要配置文件。&copy;) 
      <BR>答: &nbsp;<INPUT class=radio name=text1963 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=A>A.httpd.conf<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio 
      name=text1963 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=B>B.srm.conf<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio 
      name=text1963 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=C>C.access.conf<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio 
      name=text1963 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=D>D.apache.conf<BR></TD></TR>
  <TR class=trh1>
    <TD align=middle height=212 width=29>40 </TD>
    <TD align=left height=212 width=607>&nbsp; &nbsp; 指令 ServerAdmin 
      的作用是__(58)__&copy;) <BR>答: &nbsp;<INPUT class=radio name=text1965 
      onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=A>A.设定该WWW服务器的系统管理员账号<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio 
      name=text1965 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=B>B.设定系统管理员的电子邮件地址<BR>&nbsp; &nbsp; &nbsp; <INPUT class=radio 
      name=text1965 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=C>C.指明服务器运行时的用户账号,服务器进程拥有该账号的所有权限<BR>&nbsp; &nbsp; &nbsp; <INPUT 
      class=radio name=text1965 onblur="this.className='radio'" 
      onfocus="this.className='inputedit';this.select()" type=radio 
      value=D>D.指定服务器 WWW 管理界面的 URL,包括虚拟目录、监听端口等信息<BR></TD></TR>
  <TR class=trh1>
    <TD align=middle height=212 width=29>41 </TD>
    <TD align=left height=212 width=607>&nbsp; &nbsp; 设置 index.html 或 

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