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<td width="100%" bgcolor="#336666"><b><font face="Arial" size="2" color="#FFFFFF">Overview</font></b></td>
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<font face="Arial" size="2">As the enterprise grows beyond a
single location, it is necessary to interconnect the LANs in the
various branches to form a wide-area network (WAN). This module
examines some of the options available for these interconnections,
the hardware needed to implement them, and the terminology used to
discuss them.</font><p>
<font face="Arial" size="2">There are many options currently
available today for implementing WAN solutions. They differ in
technology, speed, and cost. Familiarity with these technologies
is an important part of network design and evaluation. </font>
</p>
<p>
<font face="Arial" size="2">If all data traffic in an enterprise
is within a single building, a LAN meets the
needs of the organization. Buildings can be interconnected with
high-speed data links to form a campus LAN if data must flow
between buildings on a single campus. However, a WAN is needed to
carry data if it must be transferred between geographically
separate locations. Individual remote
access to the LAN and connection of the LAN to the Internet are
separate study topics, and will not be considered here.</font></p>
<p>
<font face="Arial" size="2">Most students will not have the
opportunity to design a new WAN, but many will be involved in
designing additions and upgrades to existing WANs, and will be
able to apply the techniques learned in this module.</font></p>
<p>
<font face="Arial" size="2">Students completing this module should
be able to:</font></p>
<ul>
<li>
<font face="Arial" size="2">Differentiate between a LAN and WAN</font></li>
<li>
<font face="Arial" size="2">Identify the devices used in a WAN</font></li>
<li>
<font face="Arial" size="2">List WAN standards</font></li>
<li>
<font face="Arial" size="2">Describe WAN encapsulation</font></li>
<li>
<font face="Arial" size="2">Classify the various WAN link options</font></li>
<li>
<font face="Arial" size="2">Differentiate between packet-switched
and circuit-switched WAN technologies </font>
</li>
<li>
<font face="Arial" size="2">Compare and contrast current WAN
technologies</font></li>
<li>
<font face="Arial" size="2">Describe equipment involved in the
implementation of various WAN services</font></li>
<li>
<font face="Arial" size="2">Recommend a WAN service to an
organization based on its needs</font></li>
<li>
<font face="Arial" size="2">Describe DSL and cable modem
connectivity basics</font></li>
<li>
<font face="Arial" size="2">Describe a methodical procedure for
designing WANs</font></li>
<li>
<font face="Arial" size="2">Compare and contrast WAN topologies</font></li>
<li>
<font face="Arial" size="2">Compare and contrast WAN design models</font></li>
<li>
<font face="Arial" size="2">Recommend a WAN design to an
organization based on its needs</font></li>
</ul>
<p><font face="Arial" size="2"> </font></td>
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