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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 size="2" face="Arial">This
module presents an overview of WAN technologies. It introduces and
explains WAN terminology such as serial transmission, time
division multiplexing (TDM), demarcation, data terminal equipment
(DTE) and data circuit-terminating equipment (DCE). The
development and use of high-level data link control (HDLC)
encapsulation as well as methods to configure and troubleshoot a
serial interface are presented.</font><p>
<font size="2" face="Arial">Point-to-Point Protocol (PPP) is the protocol of choice to
implement over a serial WAN switched connection. It can handle
both synchronous and asynchronous communication and includes error
detection. Most importantly it incorporates an authentication
process using either CHAP or PAP. PPP can be used on various
physical media, including twisted pair, fiber optic lines and
satellite transmission. </font></p>
<p><font face="Arial" size="2">Described in this module are
configuration procedures for PPP, available options, and
troubleshooting concepts. Among the options available is the ability
of PPP to use PAP or CHAP authentication.</font></p>
<p>
<font size="2" face="Arial">Students completing this module should be able to:</font></p>
<ul>
<li>
<font size="2" face="Arial">Explain serial communication</font></li>
<li>
<font size="2" face="Arial">Describe and give an example of TDM</font></li>
<li>
<font size="2" face="Arial">Identify the demarcation point in a
WAN</font></li>
<li>
<font size="2" face="Arial">Describe the functions of the DTE and DCE</font></li>
<li>
<font size="2" face="Arial">Discuss the development of HDLC encapsulation</font></li>
<li>
<font size="2" face="Arial">Use the </font>
<font size="2" face="Courier New"><b>encapsulation hdlc</b></font><font size="2" face="Arial"> command to configure HDLC</font></li>
<li>
<font size="2" face="Arial">Troubleshoot a serial interface using
the </font>
<font size="2" face="Courier New"><b>show interface</b></font><font size="2" face="Arial">
and </font>
<font size="2" face="Courier New"><b>show controllers</b></font><font size="2" face="Arial">
commands</font></li>
<li>
<font size="2" face="Arial">Identify the advantages of using PPP </font></li>
<li>
<font size="2" face="Arial">Explain the functions of the Link Control Protocol (LCP) and the
Network Control Protocol (NCP) components of PPP</font></li>
<li>
<font size="2" face="Arial">Describe the parts of a PPP frame</font></li>
<li>
<font size="2" face="Arial">Identify the three phases of a PPP
session</font></li>
<li>
<font size="2" face="Arial">Explain the difference between PAP and
CHAP</font></li>
<li>
<font size="2" face="Arial">List the steps in the PPP
authentication process</font></li>
<li>
<font size="2" face="Arial">Identify the various PPP configuration
options</font></li>
<li>
<font size="2" face="Arial">Configure PPP encapsulation </font>
</li>
<li>
<font size="2" face="Arial">Configure CHAP and PAP authentication</font></li>
<li>
<font size="2" face="Arial">Use </font>
<font size="2" face="Courier New"><b>show interface</b></font><font size="2" face="Arial">
to verify the serial encapsulation</font></li>
<li>
<font size="2" face="Arial">Troubleshoot any problems with the PPP
configuration using </font>
<font size="2" face="Courier New"><b>debug PPP</b></font></li>
</ul>
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