<P> In computing, ipconfig (internet protocol configuration) in Microsoft Windows is a console application that displays all current TCP / IP network configuration values and can modify Dynamic Host Configuration Protocol (DHCP) and Domain Name System (DNS) settings . </P> <P> In most cases, the ipconfig command is used with the command - line switch / all . This results in more detailed information than ipconfig alone . </P> <P> An important additional feature of ipconfig is to force refreshing of the DHCP IP address of the host computer to request a different IP address . This is done using two commands in sequence . First, ipconfig / release is executed to force the client to immediately give up its lease by sending the server a DHCP release notification which updates the server's status information and marks the old client's IP address as "available". Then, the command ipconfig / renew is executed to request a new IP address . Where a computer is connected to a cable or DSL modem, it may have to be plugged directly into the modem network port to bypass the router, before using ipconfig / release and turning off the power for a period of time, to ensure that the old IP address is taken by another computer . </P>

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