What is ipconfig?
"ipconfig", internet protocol configuration in Microsoft Windows is a console application designed to be run from the Windows command prompt. It displays all current TCP/IP network configuration values and refreshes Dynamic Host Configuration Protocol DHCP and Domain Name System DNS settings.
How to use ipconfig?
1. Click Start.
2. Click Run.
3. Type cmd
4. Type the "ipconfig" command at the command prompt. The output of the default command contains the IP address, network mask and gateway for all physical and virtual network adapters.
There are several "ipconfig" options that you can use. The following are the main "ipconfig" options:
ipconfig /all: This option displays the same IP addressing information for each adapter as the default option. Additionally, it displays DNS and WINS settings for each adapter.
ipconfig /release: This option releases the IP address for the specified adapter. The command accepts either full connection names or wildcard names as follows:
ipconfig /release "Local Area Connection 1"
ipconfig /release *Local*
ipconfig /renew: This option re-establishes TCP/IP connections on all network adapters. As with the release option, ipconfig /renew takes an optional connection name specifier.
You should know that both /renew and /release options only work on clients configured for dynamic (DHCP) addressing.
ipconfig /displaydns: It display the contents of the DNS Resolver Cache.
ipconfig /flushdns: It purges the DNS Resolver cache.
ipconfig /registerdns: It refreshes all DHCP leases and re-registers DNS names. Like the /release and /renew options, /registerdns optionally takes the name(s) of specific adapters to update. If no name parameter is specified, /registerdns updates all adapters.
ipconfig /showclassid: It displays all the dhcp class IDs allowed for adapter.
ipconfig /setclassid: It modifies the dhcp class id.
