单选

● 一个HTML文件的启始标记为（41）。
（41）

A．
B． </li> <li>C．<html> </li> <li>D．<meta></li> </ul> </div> <div class="source"> 试题出自试卷《2008年下半年《网络管理员》上午试题(标准答案版)》 </div> <fieldset class="field-title"> <legend class="t-c">参考答案</legend> </fieldset> <div id="answer" data-qid="170707131488538624"> </div> <div class="functions"> <a href="/paper/202103162314465532973056.html" role="button" class="weui-btn weui-btn_default weui-btn_medium">查看试卷详情</a> <div id="popover" class="popover hide" role="dialog" aria-hidden="true" aria-modal="true" aria-labelledby="vip_nav"> <div class="weui-mask"></div> <div class="volume_model weui-dialog"> <div class="vip_top"></div> <div class="vip_label">温馨提示</div> <div class="vip_nav">该问题答案仅针对会员用户开放，请点击购买会员卡。</div> <a class="vip_open" href="/buy.html?qid=170707131488538624" id="buyvip">马上购买会员卡</a> <div class="vip_notes"> 我已购买会员卡， <a class="exp" href="https://mpassport.yqda.net/">登录账号</a> 继续查看答案 </div> </div> </div> </div> </div> </div> <div class="weui-panel questionlist"> <div class="weui-panel__hd"><i class="fa fa-yc-square"></i><span>相关试题</span></div> <div class="weui-panel__bd"> <ol class="question-list"> <li> <h3><a href="/question/20210416170707181971181568.html"><p> ● Each machine supporting TCP has a TCP transport entity, either a library procedure, a user process, or part of the kernel. In all case, it manages TCP streams and （71） to the IP layer. A TCP （72） accepts user data streams from local process, breaks them into pieces not exceeding 64KB, and sends each piece as a separate IP （73） . When datagrams containing TCP data arrive at a machine, they are given to the TCP entity, which reconstructs the original byte streams. The IP layer gives no guarantee that datagrams will be delivered properly, so it is up to TCP to time out and （74） them as need be. Datagrams do arrive may well do so in the wrong order, it is also up to TCP to （75） them into messages in the proper sequence.</p><p>（71）</p></a></h3> <ul> <li>A. calls </li> <li>B. interfaces </li> <li>C. links </li> <li>D. produces （72）</li> <li>A. connection </li> <li>B. file </li> <li>C. entity </li> <li>D. destination （73）</li> <li>A. datagram </li> <li>B. stream </li> </ul> <div class="button"> <a href="/question/20210416170707181971181568.html" role="button" class="weui-btn weui-btn_default weui-btn_medium">点击查看答案</a> </div> </li> <li> <h3><a href="/question/20210416170707180184408064.html"><p>● 网络用户能进行QQ聊天，但在浏览器地址栏中输入www.ceiaec.org却不能正常访问该页面，此时管理员应检查（70）。</p><p>（70）</p></a></h3> <ul> <li>A. 网络物理连接是否正常</li> <li>B. DNS 服务器是否正常工作</li> <li>C. 默认网关设置是否正确</li> <li>D. IP 地址设置是否正确</li> </ul> <div class="button"> <a href="/question/20210416170707180184408064.html" role="button" class="weui-btn weui-btn_default weui-btn_medium">点击查看答案</a> </div> </li> <li> <h3><a href="/question/20210416170707178343108608.html"><p>● SMTP 使用端口（68）传输邮件报文，报文采用（69）格式表示。 </p><p>（68）</p></a></h3> <ul> <li>A．20 </li> <li>B．21 </li> <li>C．23 </li> <li>D．25 （69）</li> <li>A．ASCII </li> <li>B．Aduio </li> <li>C．jpeg </li> <li>D．image </li> </ul> <div class="button"> <a href="/question/20210416170707178343108608.html" role="button" class="weui-btn weui-btn_default weui-btn_medium">点击查看答案</a> </div> </li> <li> <h3><a href="/question/20210416170707174618566656.html"><p>● 通常使用（66）作为用户名进行匿名 FTP 访问。</p><p>（66）</p></a></h3> <ul> <li>A. guest </li> <li>B. email地址 </li> <li>C. anonymous </li> <li>D. 主机id </li> </ul> <div class="button"> <a href="/question/20210416170707174618566656.html" role="button" class="weui-btn weui-btn_default weui-btn_medium">点击查看答案</a> </div> </li> <li> <h3><a href="/question/20210416170707176313065472.html"><p>● 下列Internet应用中，传输层需要采用UDP 协议的是（67）。</p><p>（67）</p></a></h3> <ul> <li>A. IP 电话 </li> <li>B. 浏览Web页面 </li> <li>C. telnet </li> <li>D. 发送电子邮件 </li> </ul> <div class="button"> <a href="/question/20210416170707176313065472.html" role="button" class="weui-btn weui-btn_default weui-btn_medium">点击查看答案</a> </div> </li> <li> <h3><a href="/question/20210416170707171216986112.html"><p>● 在 Linux 操作系统中，网络管理员可以通过修改（64）文件对 Web 服务器端口进行配置。</p><p>（64）</p></a></h3> <ul> <li>A. inetd.conf </li> <li>B. lilo.conf </li> <li>C. httpd.conf </li> <li>D. resolv.conf</li> </ul> <div class="button"> <a href="/question/20210416170707171216986112.html" role="button" class="weui-btn weui-btn_default weui-btn_medium">点击查看答案</a> </div> </li> <li> <h3><a href="/question/20210416170707172856958976.html"><p>● 在Windows的cmd命令窗口中输入（65）命令，可以查看本机路由信息。</p><p>（65）</p></a></h3> <ul> <li>A. ipconfig /renew </li> <li>B. ping </li> <li>C. netstat –r </li> <li>D. nslookup</li> </ul> <div class="button"> <a href="/question/20210416170707172856958976.html" role="button" class="weui-btn weui-btn_default weui-btn_medium">点击查看答案</a> </div> </li> <li> <h3><a href="/question/20210416170707169409241088.html"><p>● 在Linux操作系统中，（63）命令可以将文件备份到磁带上。</p><p>（63）</p></a></h3> <ul> <li>A. cp </li> <li>B. tar </li> <li>C. dir </li> <li>D. tr</li> </ul> <div class="button"> <a href="/question/20210416170707169409241088.html" role="button" class="weui-btn weui-btn_default weui-btn_medium">点击查看答案</a> </div> </li> <li> <h3><a href="/question/20210416170707167672799232.html"><p>● 下面关于防火墙的说法，正确的是（62）。</p><p>（62）</p></a></h3> <ul> <li>A．防火墙一般由软件以及支持该软件运行的硬件系统构</li> <li>B．防火墙只能防止未经授权的信息发送到内网</li> <li>C．防火墙一般能准确地检测出攻击来自哪一台计算机</li> <li>D．防火墙的主要支撑技术是加密技术</li> </ul> <div class="button"> <a href="/question/20210416170707167672799232.html" role="button" class="weui-btn weui-btn_default weui-btn_medium">点击查看答案</a> </div> </li> <li> <h3><a href="/question/20210416170707164220887040.html"><p>● Windows Server 2003的IIS 为WEB服务提供了各种选项，利用这些选项可以更好的配置 WEB 服务的性能、行为和安全等，其中“限制连接数”选项属于下图中的（59）选项卡。</p><p>（59）</p></a></h3> <ul> <li>A．HTTP头 </li> <li>B．性能 </li> <li>C．主目录 </li> <li>D．文档 <IMG alt="" src="//img1.yqda.net/question-name/99/f743941eca748da05de0b0c8b9520c.gif" border=0></li> </ul> <div class="button"> <a href="/question/20210416170707164220887040.html" role="button" class="weui-btn weui-btn_default weui-btn_medium">点击查看答案</a> </div> </li> </ol> </div> </div> <div class="weui-panel listpaper"> <div class="weui-panel__hd"><i class="fa fa-yc-square"></i><span>相关试卷</span></div> <div class="weui-panel__bd"> <div class="weui-media-box weui-media-box_small-appmsg"> <div class="weui-cells"> <a class="weui-cell weui-cell_active weui-cell_access weui-cell_example" target="_blank" title="高级经济师考试试题精选练习（1）" href="/paper/202103161854978527334400.html"> <div class="weui-cell__hd"> <i class="fa fa-file-text-o"></i> </div> <div class="weui-cell__bd weui-cell_primary"> <p>高级经济师考试试题精选练习（1） </p> </div> <div class="weui-cell__ft"> <i>所属类型：模拟考试</i><i>2021-03-22</i> </div> </a> <a class="weui-cell weui-cell_active 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● 一个HTML文件的启始标记为 （41） 。（41）

● 一个HTML文件的启始标记为（41）。
（41）