cisco协议总结大全-星光网络学院4.htm

cisco资料：理论与实践 理论 实践 协议 发现 CDP cdp 信息 is 接口 命令 路由器

        <TR>
          <TD class=listTitle>
            <TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>
              <TBODY>
              <TR>
                <TD>精品推荐</TD></TR></TBODY></TABLE></TD></TR>
        <TR>
          <TD class=list vAlign=top>
            <SCRIPT language=javascript 
            src="CISCO协议总结大全-星光网络学院4.files/Listtopad.js"></SCRIPT>
          </TD></TR></TBODY></TABLE>
      <TABLE cellSpacing=0 cellPadding=6 width="100%" border=0>
        <TBODY>
        <TR>
          <TD class=listTitle>
            <TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>
              <TBODY>
              <TR>
                <TD>Cisco认证点击TOP10</TD></TR></TBODY></TABLE></TD></TR>
        <TR>
          <TD class=list vAlign=top>
            <TABLE style="WORD-BREAK: break-all" cellSpacing=0 cellPadding=2 
            width="100%" border=0>
              <TBODY>
              <TR>
                <TD height=18>·<A 
                  href="http://www.xgdown.com/article/51/14577_1.htm" 
                  target=_blank>交换机命令全集</A></TD></TR>
              <TR>
                <TD height=18>·<A 
                  href="http://www.xgdown.com/article/51/135662_1.htm" 
                  target=_blank>CCNA认证英文词汇中文解析--最新最全版</A></TD></TR>
              <TR>
                <TD height=18>·<A 
                  href="http://www.xgdown.com/article/51/14570_1.htm" 
                  target=_blank>路由基础命令</A></TD></TR>
              <TR>
                <TD height=18>·<A 
                  href="http://www.xgdown.com/article/51/14597_1.htm" 
                  target=_blank>网络相关名词解释</A></TD></TR>
              <TR>
                <TD height=18>·<A 
                  href="http://www.xgdown.com/article/51/14593_1.htm" 
                  target=_blank>CCNA 640-801考试IOS命令大全（二）</A></TD></TR>
              <TR>
                <TD height=18>·<A 
                  href="http://www.xgdown.com/article/51/14562_1.htm" 
                  target=_blank>基础中文命令集</A></TD></TR>
              <TR>
                <TD height=18>·<A 
                  href="http://www.xgdown.com/article/51/135372_1.htm" 
                  target=_blank>思科CCNA辅导：路由器配置和文件管理</A></TD></TR>
              <TR>
                <TD height=18>·<A 
                  href="http://www.xgdown.com/article/51/14588_1.htm" 
                  target=_blank>CCNA专业英文词汇全集(2)</A></TD></TR>
              <TR>
                <TD height=18>·<A 
                  href="http://www.xgdown.com/article/51/14539_1.htm" 
                  target=_blank>网络相关名词解释</A></TD></TR>
              <TR>
                <TD height=18>·<A 
                  href="http://www.xgdown.com/article/51/14587_1.htm" 
                  target=_blank>思科职业认证追踪系统用户指南</A></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE>
      <TABLE cellSpacing=0 cellPadding=6 width="100%" border=0>
        <TBODY>
        <TR>
          <TD class=listTitle>
            <TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>
              <TBODY>
              <TR>
                <TD>认证考试点击TOP10</TD></TR></TBODY></TABLE></TD></TR>
        <TR>
          <TD class=list vAlign=top>
            <TABLE style="WORD-BREAK: break-all" cellSpacing=0 cellPadding=2 
            width="100%" border=0>
              <TBODY>
              <TR>
                <TD height=18>·<A 
                  href="http://www.xgdown.com/article/181/111315_1.htm" 
                  target=_blank>个人简历表格</A></TD></TR>
              <TR>
                <TD height=18>·<A 
                  href="http://www.xgdown.com/article/261/111021_1.htm" 
                  target=_blank>小学教师述职报告</A></TD></TR>
              <TR>
                <TD height=18>·<A 
                  href="http://www.xgdown.com/article/181/111312_1.htm" 
                  target=_blank>个人简历样本</A></TD></TR>
              <TR>
                <TD height=18>·<A 
                  href="http://www.xgdown.com/article/181/111323_1.htm" 
                  target=_blank>大学毕业生个人简历</A></TD></TR>
              <TR>
                <TD height=18>·<A 
                  href="http://www.xgdown.com/article/181/111279_1.htm" 
                  target=_blank>个人简历范文</A></TD></TR>
              <TR>
                <TD height=18>·<A 
                  href="http://www.xgdown.com/article/181/111322_1.htm" 
                  target=_blank>学生个人简历</A></TD></TR>
              <TR>
                <TD height=18>·<A 
                  href="http://www.xgdown.com/article/186/111526_1.htm" 
                  target=_blank>求职面试自我介绍一分钟</A></TD></TR>
              <TR>
                <TD height=18>·<A 
                  href="http://www.xgdown.com/article/262/111090_1.htm" 
                  target=_blank>大学生暑期三下乡社会实践报告</A></TD></TR>
              <TR>
                <TD height=18>·<A 
                  href="http://www.xgdown.com/article/122/135369_1.htm" 
                  target=_blank>Adobe Photoshop 认证试题一</A></TD></TR>
              <TR>
                <TD height=18>·<A 
                  href="http://www.xgdown.com/article/181/111297_1.htm" 
                  target=_blank>个人简历模板-标准简历(简历模板)</A></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE>
      <TABLE cellSpacing=0 cellPadding=6 width="100%" border=0>
        <TBODY>
        <TR>
          <TD class=listTitle>
            <TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>
              <TBODY>
              <TR>
                <TD>精选专题</TD></TR></TBODY></TABLE></TD></TR>
        <TR>
          <TD class=list vAlign=top align=middle>
            <SCRIPT src="CISCO协议总结大全-星光网络学院4.files/artic150_100.js"></SCRIPT>
          </TD></TR></TBODY></TABLE></TD>
    <TD class=columncontent vAlign=top width=563>
      <TABLE cellSpacing=0 cellPadding=6 width="100%" border=0>
        <TBODY>
        <TR>
          <TD class=columnTitle>
            <TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>
              <TBODY>
              <TR>
                <TD>
                  <DIV align=center>
                  <H1>CISCO协议总结大全</H1></DIV></TD></TR></TBODY></TABLE></TD></TR>
        <TR>
          <TD vAlign=top>
            <TABLE style="TABLE-LAYOUT: fixed; BORDER-COLLAPSE: collapse" 
            cellSpacing=1 cellPadding=2 width="100%" border=0>
              <TBODY>
              <TR>
                <TD vAlign=top colSpan=3>
                  <DIV align=center>作者: 来源: 时间:2006-8-31 7:36:04 </DIV></TD></TR>
              <TR>
                <TD vAlign=top align=middle colSpan=3>
                  <SCRIPT language=javascript 
                  src="CISCO协议总结大全-星光网络学院4.files/wangzhai.js"></SCRIPT>
                </TD></TR>
              <TR>
                <TD vAlign=top align=left colSpan=3>
                  <DIV align=center><STRONG>
                  <SCRIPT src="CISCO协议总结大全-星光网络学院4.files/artic_468.js"></SCRIPT>
                  </STRONG></DIV></TD></TR>
              <TR>
                <TD vAlign=top width=270 
                background=CISCO协议总结大全-星光网络学院4.files/line.gif height=1></TD></TR>
              <TR>
                <TD vAlign=top colSpan=3>
                  <TABLE height=352 cellSpacing=0 cellPadding=0 width=310 
                  align=left border=0>
                    <TBODY>
                    <TR>
                      <TD align=middle>
                        <SCRIPT 
                        src="CISCO协议总结大全-星光网络学院4.files/artic300.js"></SCRIPT>
                      </TD></TR></TBODY></TABLE>
                  <P><B>CISCO协议总结大全(4)</B> 　　ISL 标签(Tagging)能与 802.1Q 
                  干线执行相同任务，只是所采用的帧格式不同。ISL 干线(Trunks)是 Cisco 
                  私有，即指两设备间(如交换机)的一条点对点连接线路。在“交换链路内协议”名称中即包含了这层含义。ISL 
                  帧标签采用一种低延迟(Low-Latency)机制为单个物理路径上的多 VLANs 流量提供复用技术。ISL 
                  主要用于实现交换机、路由器以及各节点(如服务器所使用的网络接口卡)之间的连接操作。为支持 ISL 
                  功能特征，每台连接设备都必须采用 ISL 配置。ISL 所配置的路由器支持 VLAN 内通信服务。非 ISL 
                  配置的设备，则用于接收由 ISL 封装的以太帧(Ethernet Frames)，通常情况下，非 ISL 
                  配置的设备将这些接收的帧及其大小归因于协议差错。</P>
                  <P>　　和 802.1Q 一样，ISL 作用于 OSI 模型第2层。所不同的是，ISL