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ccna

        <p><a name="REF42332"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">ESnet</font></b></a><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><strong><font size="2" face="Arial">Energy Sciences Network</font></strong><font size="2" face="Arial">.
            Data communications network managed and funded by the U.S.
            Department of Energy Office of Energy Research (DOE/OER).
            Interconnects the DOE to educational institutions and other research
            facilities.<br>
            </font></dd>
        </dl>
        <p><a name="REF16746"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">Ethernet</font></b></a><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">Baseband LAN specification invented by
            Xerox Corporation and developed jointly by Xerox, Intel, and Digital
            Equipment Corporation. Ethernet networks use CSMA/CD and run over a
            variety of cable types at 10 Mbps. Ethernet is similar to the IEEE
            802.3 series of standards. See also <a href="nums.html#REF22966"><i>10BASE2</i></a>,
            <a href="nums.html#REF33691"><i>10BASE5</i></a>,
            <a href="nums.html#REF16721"><i>10BASE-F</i></a>,
            <a href="nums.html#REF21724"><i>10BASE-T</i></a>,
            <a href="nums.html#REF20152"><i>10Broad36</i></a>,
            and <a href="i.html#REF32637"><i>IEEE
            802.3</i></a>.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">Ethernet Interface Processor</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">See <a href="e.html#REF31821"><i>EIP</i></a>.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">EtherTalk</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">AppleTalk protocols running on
            Ethernet.<br>
            </font></dd>
        </dl>
        <p><a name="REF22426"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">ETSI</font></b></a><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><strong><font size="2" face="Arial">European Telecommunication
            Standards Institute</font></strong><font size="2" face="Arial">.
            Organization created by the European PTTs and the European Community
            (EC) to propose telecommunications standards for Europe.<br>
            </font></dd>
        </dl>
        <p><a name="REF28007"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">EUnet</font></b></a><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><strong><font size="2" face="Arial">European Internet</font></strong><font size="2" face="Arial">.
            European commercial Internet service provider. EUnet is designed to
            provide electronic mail, news, and other Internet services to
            European markets.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">European Academic Research Network</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">See <a href="e.html#REF25908"><i>EARN</i></a>.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">European Computer Manufacturers
        Association</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">See <a href="e.html#REF35157"><i>ECMA</i></a>.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">European Telecommunication Standards
        Institute</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">See <a href="e.html#REF22426"><i>ETSI</i></a>.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">European Internet</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">See <a href="e.html#REF28007"><i>EUnet</i></a>.<br>
            </font></dd>
        </dl>
        <p><a name="REF35583"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">event</font></b></a><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">Network message indicating operational
            irregularities in physical elements of a network or a response to
            the occurrence of a significant task, typically the completion of a
            request for information. See also <a href="a.html#REF33463"><i>alarm</i></a>
            and <a href="t.html#REF14936"><i>trap</i></a>.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">Excess Burst</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">See <a href="b.html#REF12693"><i>Be</i></a>.<br>
            </font></dd>
        </dl>
        <p><a name="REF26186"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">excess rate</font></b></a><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">Traffic in excess of the insured rate
            for a given connection. Specifically, the excess rate equals the
            maximum rate minus the insured rate. Excess traffic is delivered
            only if network resources are available and can be discarded during
            periods of congestion. Compare with <a href="i.html#REF30162"><i>insured
            rate</i></a> and <a href="m.html#REF16085"><i>maximum
            rate</i></a>.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">exchange identification</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">See <a href="x.html#REF30408"><i>XID</i></a>.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">EXEC</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">The interactive command processor of
            the Cisco IOS software.<br>
            </font></dd>
        </dl>
        <p><a name="REF20736"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">expansion</font></b></a><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">The process of running a compressed
            data set through an algorithm that restores the data set to its
            original size. Compare with <a href="c.html#REF11782"><i>companding</i></a>
            and <a href="c.html#REF31979"><i>compression</i></a>.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">expectational acknowledgment</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">Type of confirmation scheme in which
            the acknowledgment (ACK) number refers to the octet that will be
            sent next.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">expedited delivery</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">Option set by a specific protocol
            layer telling other protocol layers (or the same protocol layer in
            another network device) to handle specific data more rapidly.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">explicit route</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">In SNA, a route from a source subarea
            to a destination subarea, as specified by a list of subarea nodes
            and transmission groups that connect the two.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">explorer frame</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">Frame sent out by a networked device
            in a SRB environment to determine the optimal route to another
            networked device.<br>
            </font></dd>
        </dl>
        <p><a name="REF10958"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">explorer packet</font></b></a><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">Generated by an end station trying to
            find its way through a SRB network. Gathers a hop-by-hop description
            of a path through the network by being marked (updated) by each
            bridge that it traverses, thereby creating a complete topological
            map. See also <a href="a.html#REF24217"><i>all-routes
            explorer packet</i></a>, <a href="l.html#REF22036"><i>local
            explorer packet</i></a>, and <a href="s.html#REF36359"><i>spanning
            explorer packet</i></a>.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">Extended Binary Coded Decimal
        Interchange Code</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">See <a href="e.html#REF29356"><i>EBCDIC</i></a>.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">Extended Industry-Standard
        Architecture</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">See <a href="e.html#REF17465"><i>EISA</i></a>.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">Extended Superframe Format</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">See <a href="e.html#REF15058"><i>ESF</i></a>.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">exterior gateway protocol</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">Any internetwork protocol used to
            exchange routing information between autonomous systems. Not to be
            confused with <i>Exterior Gateway Protocol (EGP)</i>, which is a
            particular instance of an exterior gateway protocol.<br>
            </font></dd>
        </dl>
        <p><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">Exterior Gateway Protocol</font></b><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">See <a href="e.html#REF19752"><i>EGP</i></a>.<br>
            </font></dd>
        </dl>
        <p><a name="REF30139"><img border="0" src="../../images/bullet.gif" width="17" height="12"><b><font size="2" face="Arial">exterior router</font></b></a><font size="2" face="Arial"><br>
        </font>
        <dl>
          <dd><font size="2" face="Arial">Router connected to an AURP tunnel,
            responsible for the encapsulation and deencapsulation of AppleTalk
            packets in a foreign protocol header (for example, IP). See also <a href="a.html#REF30376"><i>AURP</i></a>
            and <a href="a.html#REF10402"><i>AURP
            tunnel</i></a>.<br>
            </font></dd>
        </dl>
      </td>
    </tr>
  </table>

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