e.html

ccna

        </font>
        <dl>
          <dd><font size="2" face="Arial">The application of a specific
            algorithm to data so as to alter the appearance of the data making
            it incomprehensible to those who are not authorized to see the
            information. See also <a href="d.html#REF14508"><i>decryption</i></a>.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">end node</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">See <a href="e.html#REF38054"><i>EN</i></a>.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">end of transmission</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">See <a href="e.html#REF12160"><i>EOT</i></a>.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">end point</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">Device at which a virtual circuit or
            virtual path begins or ends.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">end system</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">See <a href="e.html#REF40332"><i>ES</i></a>.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">End System-to-Intermediate System</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">See <a href="e.html#REF37911"><i>ES-IS</i></a>.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">Energy Sciences Network</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">See <a href="e.html#REF42332"><i>ESnet</i></a>.<br>
            </font></dd>
        </dl>
        <p><a name="REF36190"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">Enhanced IGRP</font></b></a><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><strong><font size="2" face="Arial">Enhanced Interior Gateway
            Routing Protocol</font></strong><font size="2" face="Arial">.
            Advanced version of IGRP developed by Cisco. Provides superior
            convergence properties and operating efficiency, and combines the
            advantages of link state protocols with those of distance vector
            protocols. Compare with <a href="i.html#REF24029"><i>IGRP</i></a>.
            See also <a href="i.html#REF23213"><i>IGP</i></a>,
            <a href="o.html#REF23587"><i>OSPF</i></a>,
            and <a href="r.html#REF38488"><i>RIP</i></a>.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">Enhanced Interior Gateway Routing
        Protocol</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">See <a href="e.html#REF36190"><i>Enhanced
            IGRP</i></a>.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">Enterprise Management Architecture</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">See <a href="e.html#REF31041"><i>EMA</i></a>.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">Enhanced Monitoring Services</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">Set of analysis tools on the Catalyst
            5000 switch, consisting of an integrated RMON agent and the SPAN.
            These tools provide traffic monitoring, and network segment analysis
            and management. See also <a href="r.html#REF33104"><i>RMON</i></a>
            and <a href="s.html#REF27676"><i>SPAN</i></a>.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">enterprise network</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">Large and diverse network connecting
            most major points in a company or other organization. Differs from a
            WAN in that it is privately owned and maintained.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">Enterprise System Connection</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">See <a href="e.html#REF28094"><i>ESCON</i></a>.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">Enterprise System Connection channel</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">See <a href="e.html#REF39664"><i>ESCON
            channel</i></a>.<br>
            </font></dd>
        </dl>
        <p><a name="REF38385"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">entity</font></b></a><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">Generally, an individual, manageable
            network device. Sometimes called an <i>alias</i>.<br>
            </font></dd>
        </dl>
        <p><a name="REF12160"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">EOT</font></b></a><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><strong><font size="2" face="Arial">End of transmission</font></strong><font size="2" face="Arial">.
            Generally, a character that signifies the end of a logical group of
            characters or bits.<br>
            </font></dd>
        </dl>
        <p><a name="REF40747"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">EPROM</font></b></a><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><strong><font size="2" face="Arial">Erasable programmable
            read-only memory</font></strong><font size="2" face="Arial">.
            Nonvolatile memory chips that are programmed after they are
            manufactured, and, if necessary, can be erased by some means and
            reprogrammed. Compare with <a href="e.html#REF24343"><i>EEPROM</i></a>
            and <a href="p.html#REF40161"><i>PROM</i></a>.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">equalization</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">Technique used to compensate for
            communications channel distortions.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">erasable programmable read-only memory</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">See <a href="e.html#REF40747"><i>EPROM</i></a>.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">erase startup-config</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">Command used to delete the backup
            configuration file in NVRAM.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">error control</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">Technique for detecting and correcting
            errors in data transmissions.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">error-correcting code</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">Code having sufficient intelligence
            and incorporating sufficient signaling information to enable the
            detection and correction of many errors at the receiver.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">error-detecting code</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">Code that can detect transmission
            errors through analysis of received data based on the adherence of
            the data to appropriate structural guidelines.<br>
            </font></dd>
        </dl>
        <p><a name="REF40332"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">ES</font></b></a><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">1. <strong>End system</strong>.
            Generally, an end-user device on a network.<br>
            2. <strong>End system</strong>. Nonrouting host or node in an OSI
            network.<br>
            </font></dd>
        </dl>
        <p><a name="REF28094"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">ESCON</font></b></a><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><strong><font size="2" face="Arial">Enterprise System Connection</font></strong><font size="2" face="Arial">.
            IBM channel architecture that specifies a pair of fiber-optic
            cables, with either LEDs or lasers as transmitters and a signaling
            rate of 200 Mbps.<br>
            </font></dd>
        </dl>
        <p><a name="REF39664"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">ESCON channel</font></b></a><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">IBM channel for attaching mainframes
            to peripherals such as storage devices, backup units, and network
            interfaces. This channel incorporates fiber channel technology. The
            ESCON channel replaces the bus and tag channel. Compare with <a href="p.html#REF39324"><i>parallel
            channel</i></a>. See also <a href="b.html#REF12609"><i>bus
            and tag channel</i></a>.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">ESCON Multiple Image Facility</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">See <a href="e.html#REF27858"><i>EMIF</i></a>.<br>
            </font></dd>
        </dl>
        <p><a name="REF40893"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">ESD</font></b></a><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><strong><font size="2" face="Arial">Electrostatic discharge</font></strong><font size="2" face="Arial">.
            A flow or spark of electricity that originates from a static source
            such as a carpet and arcs across a gap to another object.<br>
            </font></dd>
        </dl>
        <p><a name="REF15058"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">ESF</font></b></a><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><strong><font size="2" face="Arial">Extended Superframe Format</font></strong><font size="2" face="Arial">.
            Framing type used on T1 circuits that consists of 24 frames of 192
            bits each, with the 193rd bit providing timing and other functions.
            ESF is an enhanced version of SF. See also <a href="s.html#REF37750"><i>SF</i></a>.<br>
            </font></dd>
        </dl>
        <p><a name="REF37911"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">ES-IS</font></b></a><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><strong><font size="2" face="Arial">End System-to-Intermediate
            System</font></strong><font size="2" face="Arial">. OSI protocol
            that defines how end systems (hosts) announce themselves to
            intermediate systems (routers). See also <a href="i.html#REF41528"><i>IS-IS</i></a>.<br>
            </font></dd>
        </dl>