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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"> <tbody> <tr> <td> <p><a name="REF17966"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font face="Arial" size="2">WAN</font></b></a><font face="Arial" size="2"><br> </font> <dl> <dd><font face="Arial" size="2"><strong>Wide-area network</strong>. Data communications network that serves users across a broad geographic area and often uses transmission devices provided by common carriers. Frame Relay, SMDS, and X.25 are examples of WANs. Compare with <a href="l.html#REF40960"><i>LAN</i></a> and <a href="m.html#REF26963"><i>MAN</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><a name="REF29626"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b>watchdog</b></a><br> </font> <dl> <dd><font size="2" face="Arial">Watchdog timer manager that runs on the NP of each LightStream 2020 ATM switch in an ATM network. The watchdog process rearms the watchdog timer so that the system automatically restarts if the NP fails. See also <a href="w.html#REF38381"><i>watchdog timer</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><a name="REF27560"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b>watchdog packet</b></a><br> </font> <dl> <dd><font size="2" face="Arial">Used to ensure that a client is still connected to a NetWare server. If the server has not received a packet from a client for a certain period of time, it sends that client a series of watchdog packets. If the station fails to respond to a predefined number of watchdog packets, the server concludes that the station is no longer connected and clears the connection for that station.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b>watchdog spoofing</b><br> </font> <dl> <dd><font size="2" face="Arial">Subset of spoofing that refers specifically to a router acting for a NetWare client by sending watchdog packets to a NetWare server to keep the session between client and server active. See also <a href="s.html#REF18478"><i>spoofing</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><a name="REF38381"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b>watchdog timer</b></a><br> </font> <dl> <dd><font size="2" face="Arial">1.) Hardware or software mechanism that is used to trigger an event or an escape from a process unless the timer is periodically reset. See also <a href="w.html#REF29626"><i>watchdog</i></a>.<br> 2.) In NetWare, a timer that indicates the maximum period of time that a server will wait for a client to respond to a watchdog packet. If the timer expires, the server sends another watchdog packet (up to a set maximum). See also <a href="w.html#REF27560"><i>watchdog packet</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b>waveform coding</b><br> </font> <dl> <dd><font size="2" face="Arial">Electrical techniques used to convey binary signals<i>.</i><br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b>wide-area network</b><br> </font> <dl> <dd><font size="2" face="Arial">See <a href="w.html#REF17966"><i>WAN</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b>wideband</b><br> </font> <dl> <dd><font size="2" face="Arial">See <a href="b.html#REF18532"><i>broadband</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b>wildcard mask</b><br> </font> <dl> <dd><font size="2" face="Arial">32-bit quantity used in conjunction with an IP address to determine which bits in an IP address should be ignored when comparing that address with another IP address. A wildcard mask is specified when setting up access lists.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b>window</b><br> </font> <dl> <dd><font size="2" face="Arial">Number of octets that the receiver is willing to accept.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b>window</b> <strong>size</strong><br> </font> <dl> <dd><font size="2" face="Arial">Refers to the number of messages that can be transmitted while awaiting an acknowledgment.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b>wire map</b><br> </font> <dl> <dd><font size="2" face="Arial">Feature provided by most cable testers. Used to test twisted pair cable installations, it shows which wire pairs connect to what pins on the plugs and sockets.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b>wiring closet</b><br> </font> <dl> <dd><font size="2" face="Arial">Specially designed room used for wiring a data or voice network. Wiring closets serve as a central junction point for the wiring and wiring equipment that is used for interconnecting devices.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b>WISCNET</b><br> </font> <dl> <dd><font size="2" face="Arial">TCP/IP network in Wisconsin (United States) connecting University of Wisconsin campuses and a number of private colleges. Links are 56 Kbps and T1.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b>workgroup</b><br> </font> <dl> <dd><font size="2" face="Arial">Collection of workstations and servers on a LAN that are designed to communicate and exchange data with one another.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b>WorkGroup Director</b><br> </font> <dl> <dd><font size="2" face="Arial">Cisco SNMP-based network-management software tool. Workgroup Director runs on UNIX workstations either as a standalone application or integrated with another SNMP-based network management platform, providing a seamless, powerful management system for Cisco workgroup products. See also <a href="s.html#REF22175"><i>SNMP</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b>workgroup switching</b><br> </font> <dl> <dd><font size="2" face="Arial">Method of switching that provides high-speed (100-Mbps) transparent bridging between Ethernet networks and high-speed translational bridging between Ethernet and CDDI or FDDI.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b>World Wide Web</b><br> </font> <dl> <dd><font size="2" face="Arial">See <a href="w.html#REF11663"><i>WWW</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b>wrap</b><br> </font> <dl> <dd><font size="2" face="Arial">Action taken by an FDDI or CDDI network to recover in the event of a failure. The stations on each side of the failure reconfigure themselves, creating a single logical ring out of the primary and secondary rings.<br> </font></dd> </dl> <p><font face="Arial" size="2"><a name="REF11663"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b>WWW</b></a><br> </font> <dl> <dd><font face="Arial" size="2"><strong>World Wide Web</strong>. Large network of Internet servers providing hypertext and other services to terminals running client applications such as a WWW browser. See also <a href="w.html#REF31186"><i>WWW browser</i></a>.<br> </font></dd> </dl> <p><font face="Arial" size="2"><a name="REF31186"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b>WWW browser</b></a><br> </font> <dl> <dd><font size="2" face="Arial">GUI-based hypertext client application, such as Mosaic, used to access hypertext documents and other services located on innumerable remote servers throughout the WWW and Internet. See also <a href="h.html#REF27673"><i>hypertext</i></a>, <a href="i.html#REF21501"><i>Internet</i></a>, <a href="m.html#REF12171"><i>Mosaic</i></a>, and <a href="w.html#REF11663"><i>WWW</i></a>.<br> </font></dd> </dl> </td> </tr> </tbody> </table> </body></html>⌨️ 快捷键说明
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