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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"><a name="REF10330"><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>Q.920/Q.921</b> </font></a><font face="Arial" size="2"><br> </font></p> <dl> <dd><font face="Arial" size="2">ITU-T specifications for the ISDN UNI data link layer. See also <a href="u.html#REF29467"><i>UNI</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>Q.922A</b><br> </font> <dl> <dd><font face="Arial" size="2">ITU-T specification for Frame Relay encapsulation.<br> </font></dd> </dl> <p><a name="REF32284"><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>Q.931</b> </font> </a><font face="Arial" size="2"><br> </font> <dl> <dd><font face="Arial" size="2">ITU-T specification for signaling to establish, maintain, and clear ISDN network connections. See also <a href="q.html#REF32284"></a><a href="q.html#REF36265"><i>Q.93B</i></a>.<br> </font></dd> </dl> <p><a name="REF36265"><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>Q.93B</b> </font> </a><font face="Arial" size="2"><br> </font> <dl> <dd><font face="Arial" size="2">ITU-T specification signaling to establish, maintain, and clear BISDN network connections. An evolution of ITU-T recommendation Q.931. See also <a href="q.html#REF32284"><i>Q.931</i></a>.<br> </font></dd> </dl> <p><a name="REF29364"><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>QLLC</b> </font> </a><font face="Arial" size="2"><br> </font> <dl> <dd><strong><font face="Arial" size="2">Qualified Logical Link Control</font></strong><font face="Arial" size="2">. Data link layer protocol defined by IBM that allows SNA data to be transported across X.25 networks.<br> </font></dd> </dl> <p><a name="REF40542"><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>QOS</b> </font> </a><font face="Arial" size="2"><br> </font> <dl> <dd><strong><font face="Arial" size="2">Quality of service</font></strong><font face="Arial" size="2">. Measure of performance for a transmission system that reflects its transmission quality and service availability.<br> </font></dd> </dl> <p><a name="REF31985"><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>QOS parameters</b> </font> </a><font face="Arial" size="2"><br> </font> <dl> <dd><strong><font face="Arial" size="2">Quality of service parameters</font></strong><font face="Arial" size="2">. Parameters that control the amount of traffic the source router in an ATM network sends over an SVC. If any switch along the path cannot accommodate the requested QOS parameters, the request is rejected, and a rejection message is forwarded back to the originator of the request.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>Qualified Logical Link Control</b><br> </font> <dl> <dd><font face="Arial" size="2">See <a href="q.html#REF29364"><i>QLLC</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>quality of service</b><br> </font> <dl> <dd><font face="Arial" size="2">See <a href="q.html#REF40542"><i>QOS</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>quartet signaling</b><br> </font> <dl> <dd><font face="Arial" size="2">Signaling technique used in 100VG-AnyLAN networks that allows data transmission at 100 Mbps over four pairs of UTP cabling at the same frequencies used in 10BASE-T networks. See also <a href="nums.html#REF25457"><i>100VG-AnyLAN</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>query</b><br> </font> <dl> <dd><font face="Arial" size="2">Message used to inquire about the value of some variable or set of variables.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>queue</b><br> </font> <dl> <dd><font face="Arial" size="2">1.) Generally, an ordered list of elements waiting to be processed.<br> 2.) In routing, a backlog of packets waiting to be forwarded over a router interface.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>queuin</b><strong>g delay<br> </strong></font> <dl> <dd><font face="Arial" size="2">Amount of time that data must wait before it can be transmitted onto a statistically multiplexed physical circuit.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"> <b>queuing theory</b><br> </font> <dl> <dd><font face="Arial" size="2">Scientific principles governing the formation or lack of formation of congestion on a network or at an interface.</font></dd> </dl> </td> </tr> </table></body></html>⌨️ 快捷键说明
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