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<font face="Arial" size="2" color="#FFFFFF">Summary</font></b></td>
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<p><font face="Arial" size="2">
An understanding of the following key points should
have been achieved:</font><ul>
<li><font face="Arial" size="2">
Private addresses are for private, internal use and should never be
routed by a public Internet router.</font></li>
<li><font face="Arial" size="2">
NAT alters the IP header of a packet so that the destination
address, the source address, or both addresses are replaced with
different addresses.</font></li>
<li><font face="Arial" size="2">
PAT uses unique source port numbers on the inside global IP address
to distinguish between translations.</font></li>
<li><font face="Arial" size="2">
NAT translations can occur dynamically or statically and can be used
for a variety of uses.</font></li>
<li><font face="Arial" size="2">
NAT and PAT may be configured for static translation, dynamic
translation, and overloading.</font></li>
<li><font face="Arial" size="2">
The process for verifying NAT and PAT configuration include the </font>
<font face="Courier New" size="2">
<b>clear</b></font><font face="Arial" size="2">
and </font><font face="Courier New" size="2">
<b>show</b></font><font face="Arial" size="2">
commands.</font></li>
<li><font face="Arial" size="2">
The </font><font face="Courier New" size="2">
<b>debug ip nat</b></font><font face="Arial" size="2">
command is used for troubleshooting NAT and PAT
configuration.</font></li>
<li><font face="Arial" size="2">
NAT has advantages and disadvantages.</font></li>
<li><font face="Arial" size="2">
DHCP works in a client/server mode, enabling clients to obtain IP
configurations from a DHCP server.</font></li>
<li><font face="Arial" size="2">
BOOTP is the predecessor of DHCP and shares some operational
characteristics with DHCP, but BOOTP is not dynamic.</font></li>
<li><font face="Arial" size="2">A DHCP server manages pools of IP
addresses and associated parameters. Each pool is dedicated to an
individual logical IP subnet.</font></li>
<li><font face="Arial" size="2">
The DHCP client configuration process has four steps.</font></li>
<li><font face="Arial" size="2">
Usually, a DCHP server is configured to assign more than IP
addresses.</font></li>
<li><font face="Arial" size="2">
The </font><font face="Courier New" size="2">
<b>show ip dhcp binding</b></font><font face="Arial" size="2">
command is used to verify DHCP operation.</font></li>
<li><font face="Arial" size="2">
The </font><font face="Courier New" size="2">
<b>debug ip dhcp server events</b></font><font face="Arial" size="2">
command is used for troubleshooting DHCP.</font></li>
<li><font face="Arial" size="2">
When a DHCP server and a client are not on the same segment and are
separated by a router, the </font><font face="Courier New" size="2">
<b>ip helper-address</b></font><font face="Arial" size="2">
command is used to relay
broadcast requests.</font></li>
</ul>
<p><font face="Arial" size="2"> </font></td>
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