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<html><head><meta http-equiv="Content-Type" content="text/html; charset=windows-1252"><meta name="GENERATOR" content="Microsoft FrontPage 4.0"><meta name="ProgId" content="FrontPage.Editor.Document"><title>New Page 3</title><base target="_self"></head><body background="../../images/bgindex.gif" bgcolor="#F7DB7B" leftmargin=20 topmargin=10 marginwidth="20" marginheight="10"> <table border="0" width="420" cellspacing="0" cellpadding="2"> <tr> <td valign="top"> <p align="left"><font face="Arial" size="2"> </font><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b><font face="Arial" size="2">Nagle's algorithm</font></b><font face="Arial" size="2"><br> </font></p> <blockquote> <p><font face="Arial" size="2">Actually two separate congestion control algorithms that can be used in TCP-based networks. One algorithm reduces the sending window; the other limits small datagrams.<br> </font></p> </blockquote> <p><font face="Arial" size="2"><a name="REF21390"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>NAK</b></a><br> </font> <dl> <dd><font face="Arial" size="2"><strong>Negative acknowledgment</strong>. Response sent from a receiving device to a sending device indicating that the information received contained errors. Compare to <a href="a.html#REF11523"><i>acknowledgment</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>Name Binding Protocol</b><br> </font> <dl> <dd><font face="Arial" size="2">See <a href="n.html#REF27657"><i>NBP</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>name caching</b><br> </font> <dl> <dd><font face="Arial" size="2">Method by which remotely discovered host names are stored by a router for use in future packet-forwarding decisions to allow quick access.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>name resolution</b><br> </font> <dl> <dd><font face="Arial" size="2">Generally, the process of associating a name with a network location.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>name server</b><br> </font> <dl> <dd><font face="Arial" size="2">Server connected to a network that resolves network names into network addresses.<br> </font></dd> </dl> <p><font face="Arial" size="2"><a name="REF27718"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>NAP</b></a><br> </font> <dl> <dd><font face="Arial" size="2"><strong>Network access point</strong>. Location for interconnection of Internet service providers in the United States for the exchange of packets.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>narrowband</b><br> </font> <dl> <dd><font face="Arial" size="2">See <a href="b.html#REF29688"><i>baseband</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>Narrowband ISDN</b><br> </font> <dl> <dd><font face="Arial" size="2">See <a href="n.html#REF35967"><i>N-ISDN</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>National Bureau of Standards</b><br> </font> <dl> <dd><font face="Arial" size="2">See <a href="n.html#REF22694"><i>NBS</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>National Institute of Standards and Technology</b><br> </font> <dl> <dd><font face="Arial" size="2">See <a href="n.html#REF14023"><i>NIST</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>National Research and Education Network</b><br> </font> <dl> <dd><font face="Arial" size="2">See <a href="n.html#REF30890"><i>NREN</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>National Science Foundation</b><br> </font> <dl> <dd><font face="Arial" size="2">See <a href="n.html#REF26450"><i>NSF</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>National Science Foundation Network</b><br> </font> <dl> <dd><font face="Arial" size="2">See <a href="n.html#REF40283"><i>NSFNET</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>native client interface architecture</b><br> </font> <dl> <dd><font face="Arial" size="2">See <a href="n.html#REF41603"><i>NCIA</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><a name="REF29595"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>NAU</b></a><br> </font> <dl> <dd><font face="Arial" size="2"><strong>Network addressable unit</strong>. SNA term for an addressable entity. Examples include LUs, PUs, and SSCPs. NAUs generally provide upper-level network services. Compare with <a href="p.html#REF38896"><i>path control network</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><a name="REF23527"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>NAUN</b></a><br> </font> <dl> <dd><font face="Arial" size="2"><strong>Nearest active upstream neighbor</strong>. In Token Ring or IEEE 802.5 networks, the closest upstream network device from any given device that is still active.<br> </font></dd> </dl> <p><font face="Arial" size="2"><a name="REF22988"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>NBMA</b></a><br> </font> <dl> <dd><font face="Arial" size="2"><strong>Nonbroadcast multiaccess</strong>. Term describing a multiaccess network that either does not support broadcasting (such as X.25) or in which broadcasting is not feasible (for example, an SMDS broadcast group or an extended Ethernet that is too large). See also <a href="m.html#REF41314"><i>multiaccess network</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><a name="REF27657"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>NBP</b></a><br> </font> <dl> <dd><font face="Arial" size="2"><strong>Name Binding Protocol</strong>. AppleTalk transport-level protocol that translates a character string name into an internetwork address.<br> </font></dd> </dl> <p><font face="Arial" size="2"><a name="REF22694"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>NBS</b></a><br> </font> <dl> <dd><font face="Arial" size="2"><strong>National Bureau of Standards</strong>. Organization that was part of the U.S. Department of Commerce. Now known as NIST. See also <a href="n.html#REF14023"><i>NIST</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><a name="REF41603"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>NCIA</b></a><br> </font> <dl> <dd><font face="Arial" size="2"><strong>Native client interface architecture</strong>. SNA applications-access architecture, developed by Cisco, that combines the full functionality of native SNA interfaces at both the host and client with the flexibility of leveraging TCP/IP backbones. NCIA encapsulates SNA traffic on a client PC or workstation, thereby providing direct TCP/IP access while preserving the native SNA interface at the end-user level. In many networks, this capability obviates the need for a standalone gateway and can provide flexible TCP/IP access while preserving the native SNA interface to the host.<br> </font></dd> </dl> <p><font face="Arial" size="2"><a name="REF37930"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>NCP</b></a><br> </font> <dl> <dd><font face="Arial" size="2"><strong>Network Control Program</strong>. In SNA, a program that routes and controls the flow of data between a communications controller (in which it resides) and other network resources.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>NCP/Token Ring Interconnection</b><br> </font> <dl> <dd><font face="Arial" size="2">See <a href="n.html#REF39280"><i>NTRI</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><a name="REF29400"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>ND</b></a><br> </font> <dl> <dd><font face="Arial" size="2"><strong>Neighborhood discovery</strong>. Process that runs on the NP of each LightStream 2020 ATM switch in the ATM network. For call routing purposes, every node in the network needs to know about changes in network topology, such as trunks and ports going up or down. ND learns about such changes at the chassis level and forwards this information to the GID process, which sends the information throughout the network. Sometimes referred to as <i>neighborhood discovery daemon</i>, or <i>NDD</i>. See also <a href="g.html#REF20537"><i>GID</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>NDD</b><br> </font> <dl> <dd><font face="Arial" size="2"><strong>Neighborhood discovery daemon</strong>. See <a href="n.html#REF29400"><i>ND</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><a name="REF17279"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>NDIS</b></a><br> </font> <dl> <dd><font face="Arial" size="2"><strong>Network driver interface specification</strong>. Specification for a generic, hardware- and protocol-independent device driver for NICs. Produced by Microsoft.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>nearest active upstream neighbor</b><br> </font> <dl> <dd><font face="Arial" size="2">See <a href="n.html#REF23527"><i>NAUN</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><a name="REF33973"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>NEARNET</b></a><br> </font> <dl> <dd><font face="Arial" size="2">Regional network in New England (United States) that links Boston University, Harvard University, and MIT. Now part of BBN Planet. See also <a href="b.html#REF28505"><i>BBN Planet</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>negative acknowledgment</b><br> </font> <dl> <dd><font face="Arial" size="2">See <a href="n.html#REF21390"><i>NAK</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>neighborhood discovery</b><br>⌨️ 快捷键说明
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