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一组介绍各种网络知识的文章

            <td>MSC</td>
            <td>移动交换中心</td>
            <td>Mobile Switching Center</td>
        </tr>
        <tr>
            <td>MTBF</td>
            <td>两次故障间的平均时间</td>
            <td>Media Time Between Faults</td>
        </tr>
        <tr>
            <td>MTOR</td>
            <td>故障修复所需平均时间</td>
            <td>Media Time of Repair</td>
        </tr>
        <tr>
            <td>MTP</td>
            <td>邮件传输协议</td>
            <td>Mail Transfer Protocol</td>
        </tr>
        <tr>
            <td>MTSO</td>
            <td>移动电话交换站</td>
            <td>Mobile Telephone Switching Office</td>
        </tr>
        <tr>
            <td>MTTD</td>
            <td>故障诊断所需平均时间</td>
            <td>Media Time to Diagnose</td>
        </tr>
        <tr>
            <td>MTU</td>
            <td>最大传输单元</td>
            <td>Maximum Transfer Unit</td>
        </tr>
    </table>
    <p align="center"><br>
    <a name="n">N</a> </p>
    <table border="1" width="90%">
        <tr>
            <td>NAP</td>
            <td>网络接入点</td>
            <td>Network Access Point</td>
        </tr>
        <tr>
            <td>NCA</td>
            <td>网络计算结构</td>
            <td>Network Computing Architecture</td>
        </tr>
        <tr>
            <td>NCFC</td>
            <td>中国国家计算机网络设施，<br>
            国内也称中关村网</td>
            <td>The National Computing and Network Facility of
            China</td>
        </tr>
        <tr>
            <td>NCP</td>
            <td>网络控制协议</td>
            <td>Network Control Protocol</td>
        </tr>
        <tr>
            <td>NCP</td>
            <td>网络核心协议</td>
            <td>Network Core Protocol</td>
        </tr>
        <tr>
            <td>NEXT</td>
            <td>近端串扰</td>
            <td>　</td>
        </tr>
        <tr>
            <td>NFS</td>
            <td>网络文件系统</td>
            <td>Network File System</td>
        </tr>
        <tr>
            <td>NHRP</td>
            <td>下一个节点路由协议</td>
            <td>　</td>
        </tr>
        <tr>
            <td>NHS</td>
            <td>　</td>
            <td>NHRP Server</td>
        </tr>
        <tr>
            <td>NIC</td>
            <td>　</td>
            <td>Null-Attach Concentrator</td>
        </tr>
        <tr>
            <td>NIC</td>
            <td>网卡</td>
            <td>Network Interface Card</td>
        </tr>
        <tr>
            <td>NIC</td>
            <td>网络信息中心</td>
            <td>Network Information Centre</td>
        </tr>
        <tr>
            <td>NIM</td>
            <td>网络接口模块</td>
            <td>Network Interface Module</td>
        </tr>
        <tr>
            <td>NISDN</td>
            <td>窄带ISDN</td>
            <td>Narrowband Integrited Services Digital Network</td>
        </tr>
        <tr>
            <td>NLAM</td>
            <td>网络层地址管理</td>
            <td>　</td>
        </tr>
        <tr>
            <td>NNI</td>
            <td>网络-网络接口</td>
            <td>Network-Network Interface</td>
        </tr>
        <tr>
            <td>NOMS</td>
            <td>网络营运与管理专题讨论会</td>
            <td>Network Operation and Management Symposium</td>
        </tr>
        <tr>
            <td>NREN</td>
            <td>(美国)国家研究和教育网</td>
            <td>National Research and Education Network</td>
        </tr>
        <tr>
            <td>NSAP</td>
            <td>网络服务接入点</td>
            <td>Network Service Access Point</td>
        </tr>
        <tr>
            <td>NSF</td>
            <td>（美国）国会科学基金会</td>
            <td>　</td>
        </tr>
        <tr>
            <td>NVRAM</td>
            <td>　</td>
            <td>Non-volatile RAM</td>
        </tr>
        <tr>
            <td>NVT</td>
            <td>网络虚拟终端</td>
            <td>Network Virtual Terminal</td>
        </tr>
    </table>
    <p align="center"><br>
    <a name="o">O</a> </p>
    <table border="1" width="90%">
        <tr>
            <td>OAM</td>
            <td>操作与维护</td>
            <td>Operation And Maintenance</td>
        </tr>
        <tr>
            <td>ODBC</td>
            <td>开放数据库互连</td>
            <td>Open Database Connection</td>
        </tr>
        <tr>
            <td>ORB</td>
            <td>对象请求代理</td>
            <td>Object REquest Broker</td>
        </tr>
        <tr>
            <td>OSF</td>
            <td>开放软件基金会</td>
            <td>Open Software Fundation</td>
        </tr>
        <tr>
            <td>OSI</td>
            <td>开放系统互联</td>
            <td>Open System Interconnection </td>
        </tr>
        <tr>
            <td>OSPF</td>
            <td>开放最短路径优先(协议)</td>
            <td>Open Shortest Path First</td>
        </tr>
    </table>
    <p align="center"><br>
    <a name="p">P</a> </p>
    <table border="1" width="90%">
        <tr>
            <td>PBX</td>
            <td>用户交换机</td>
            <td>Private Branch eXchange</td>
        </tr>
        <tr>
            <td>PCM</td>
            <td>脉冲编码调制</td>
            <td>Pulse Code Modulation</td>
        </tr>
        <tr>
            <td>PCN</td>
            <td>个人通信网络</td>
            <td>Personal Communications Network</td>
        </tr>
        <tr>
            <td>PCR</td>
            <td>峰值信元速率</td>
            <td>Peak Cell Rate</td>
        </tr>
        <tr>
            <td>PCS</td>
            <td>个人通信服务</td>
            <td>Personal Communications Service</td>
        </tr>
        <tr>
            <td>PDH</td>
            <td>准同步数字系列</td>
            <td>　</td>
        </tr>
        <tr>
            <td>PDA</td>
            <td>个人数字助理</td>
            <td>Personal Digital Assistant</td>
        </tr>
        <tr>
            <td>PDN</td>
            <td>公用数据网</td>
            <td>Public Data Network</td>
        </tr>
        <tr>
            <td>PDU</td>
            <td>协议数据单元</td>
            <td>Protocol Data Unit</td>
        </tr>
        <tr>
            <td>PER</td>
            <td>分组差错率</td>
            <td>packet error rate</td>
        </tr>
        <tr>
            <td>PEM</td>
            <td>　</td>
            <td>Port Expansion Module</td>
        </tr>
        <tr>
            <td>PIR</td>
            <td>分组插入率　</td>
            <td>packet insertion rate</td>
        </tr>
        <tr>
            <td>PI/SO</td>
            <td>　</td>
            <td>Primary In/Secondary Out</td>
        </tr>
        <tr>
            <td>PLCP</td>
            <td>物理层会聚协议</td>
            <td>Physical Layer Convergence Protocol</td>
        </tr>
        <tr>
            <td>PLR</td>
            <td>分组丢失率</td>
            <td>packet loss rate</td>
        </tr>
        <tr>
            <td>PMD</td>
            <td>物理媒体相关（子层）</td>
            <td>Physical Medium Dependent</td>
        </tr>
        <tr>
            <td>POH</td>
            <td>通道开销</td>
            <td>　</td>
        </tr>
        <tr>
            <td>PON</td>
            <td>无源光纤网</td>
            <td>　</td>
        </tr>
        <tr>
            <td>POP</td>
            <td>　</td>
            <td>Post Office Protocol</td>
        </tr>
        <tr>
            <td>PO/SI</td>
            <td>　</td>
            <td>Primary Out/Secondary In</td>
        </tr>
        <tr>
            <td>POTS</td>
            <td>普通老式电话业务</td>
            <td>Plain Old Telephone Service</td>
        </tr>
        <tr>
            <td>PPD</td>
            <td>部分舍弃分组数据包</td>
            <td>Partial Packet Discard</td>
        </tr>
        <tr>
            <td>PPP</td>
            <td>点到点协议</td>
            <td>Point to Point Protocol</td>
        </tr>
        <tr>
            <td>PPTP</td>
            <td>点对点隧道协议</td>
            <td>　</td>
        </tr>
        <tr>
            <td>PRM</td>
            <td>每分钟可打印输出的页数</td>
            <td>Page Per Minute</td>
        </tr>
        <tr>
            <td>PRM</td>
            <td>协议参考模型</td>
            <td>Protocol Reference Model</td>
        </tr>
        <tr>
            <td>PRN</td>
            <td>分组无线网</td>
            <td>Packet Radio Network</td>
        </tr>
        <tr>
            <td>PSN</td>
            <td>分组交换节点</td>
            <td>Packet Switch Node</td>
        </tr>
        <tr>
            <td>PSDN</td>
            <td>分组交换数据网</td>
            <td>　</td>
        </tr>
        <tr>
            <td>PSTN</td>
            <td>公用电话交换网</td>
            <td>Public Switched Telephone Network</td>
        </tr>
        <tr>
            <td>PVC</td>
            <td>永久虚电路（包括PVPC和PVCC）</td>
            <td>Permanent Virtual Circuit</td>
        </tr>
        <tr>
            <td>PVPC</td>
            <td>　</td>
            <td>permanent virtual path connection</td>
        </tr>
        <tr>
            <td>PVCC</td>
            <td>　</td>
            <td>permanent virtual channel connection</td>
        </tr>
        <tr>
            <td>PVP</td>
            <td>永久虚路径</td>
            <td>Permanent Virtual Path</td>
        </tr>
    </table>
    <p align="center"><br>
    <a name="q">Q</a> </p>
    <table border="1" width="90%">
        <tr>
            <td>QoS</td>
            <td>服务质量</td>
            <td>Quality of Service</td>
        </tr>
    </table>
    <p align="center"><br>
    <a name="r">R</a> </p>
    <table border="1" width="90%">
        <tr>
            <td>RADIUS</td>
            <td>远端授权拨号上网用户服务</td>
            <td>　</td>
        </tr>
        <tr>
            <td>RARP</td>
            <td>逆向地址解析协议</td>
            <td>Reverse Address Resolution Protocol</td>
        </tr>
        <tr>
            <td>RAS</td>
            <td>远程访问服务器</td>
            <td>　</td>
        </tr>
        <tr>
            <td>RFC</td>
            <td>请求评注</td>
            <td>Request for Comments</td>
        </tr>
        <tr>
            <td>RFT</td>
            <td>　</td>
            <td>Request for Technology</td>
        </tr>
        <tr>
            <td>RIP</td>
            <td>　</td>
            <td>Routing Information Protocol</td>
        </tr>
        <tr>
            <td>RMON</td>
            <td>远程网络管理</td>
            <td>　</td>
        </tr>
        <tr>
            <td>Router</td>
            <td>路由器</td>
            <td>　</td>
        </tr>
        <tr>
            <td>RPC</td>
            <td>远程过程调用</td>
            <td>Remote Procedure Call </td>
        </tr>
        <tr>
            <td>RSVP</td>
            <td>资源重复利用协议</td>
            <td>　</td>
        </tr>
        <tr>
            <td>RTMP</td>
            <td>　</td>
            <td>Routing Table Maintenance Protocol(用于Appletalk)</td>
        </tr>
        <tr>
            <td>RTP</td>
            <td>接收和发送端口</td>
            <td>　</td>