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<td width="100%" bgcolor="#336666"><b>
<font face="Arial" size="2" color="#FFFFFF">Summary</font></b></td>
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<font face="Arial" size="2">An understanding of the following key
points should have been achieved:</font><ul>
<li>
<font face="Arial" size="2">Differences in the geographic areas served
between WANs and LANs</font></li>
<li>
<font face="Arial" size="2">Similarities in the OSI model layers involved
between WANs and LANs</font></li>
<li>
<font face="Arial" size="2">Familiarity with WAN terminology
describing equipment, such as CPE, CO, local loop, DTE, DCE, CSU/DSU,
and TA</font></li>
<li>
<font face="Arial" size="2">Familiarity with WAN terminology
describing services and standards, such as ISDN, Frame Relay, ATM,
T1, HDLC, PPP, POST, BRI, PRI, X.25, and DSL</font></li>
<li>
<font face="Arial" size="2">Differences between packet-switched and
circuit-switched networks</font></li>
<li>
<font face="Arial" size="2">Differences and similarities between
current WAN technologies, including analog dialup, ISDN, leased line,
X.25, Frame Relay, and ATM services</font></li>
<li>
<font face="Arial" size="2">Advantages and drawbacks of DSL and cable
modem services</font></li>
<li>
<font face="Arial" size="2">Ownership and cost associated with WAN
data links</font></li>
<li>
<font face="Arial" size="2">Capacity requirements and transit times
for various WAN traffic types, such as voice, data, and video</font></li>
<li>
<font face="Arial" size="2">Familiarity with WAN topologies, such as
point-to-point, star, and meshed</font></li>
<li>
<font face="Arial" size="2">Elements of WAN design, including
upgrading, extending, modifying an existing WAN, and recommending a
WAN service to an organization based on its needs</font></li>
<li>
<font face="Arial" size="2">Advantages offered with a three-layer
hierarchical WAN design</font></li>
<li>
<font face="Arial" size="2">Alternatives for interbranch WAN traffic</font></li>
</ul>
<p><font face="Arial" size="2"> </font>
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