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IPCONFIG
IPCONFIG is an executable
(.exe) program. It displays the TCP/IP settings and
diagnostic data for NT computers. While there are several options
available, the command of most interest is IPCONFIG /ALL that
displays the IP address, subnet mask, default gateway,
WINS, and DNS configuration. If DHCP is used, the
time the lease was last renewed and when
it is due to die, (expire). By default,
IPCONFIG reports the most popular settings for all adapters.
The /ALL switch gives you all information for all adapters.
You can then check this information against what you expect it to be.
If you’re using DHCP and
some or all of the information is wrong, you probably have an
error in your DHCP configuration on the server, rather
than on the individual client PC. If you’re using DHCP and the
computer’s IPCONFIG output doesn’t list the correct information,
another possibility is that there is a router between that
computer and the DHCP server that is not BOOTP-compliant.
 TCP/IP Configuration and DHCP
If you’re using DHCP to manage client TCP/IP configuration information, and a host is not properly receiving its configuration information, check to make sure that there is not a non-BOOTP-compliant router (also known as a non-RFC 1314 compliant router) between the client computer and the DHCP server.
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If you’re not using DHCP,
then perhaps a typo was made when entering the configuration
information for that client. Check the TCP/IP configuration
settings.
To use IPCONFIG, type IPCONFIG using
the appropriate switches at the Command Prompt.
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CertiGuide for Network+ (http://www.CertiGuide.com/netplus/) on CertiGuide.com
Version 1.0 - Version Date: November 7, 2004
Adapted with permission from a work created by Tcat Houser and Helen O’Boyle.
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