HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\
The Adapters subkey stores TCP/IP configuration data that can be configured differently for each network adapter on the computer.
The Adapters subkey contains one or more subkeys, each of which represents one network adapter and is named by its network identifier. (In this file, these subkeys are represented by a generic variable, <adapter-name>.) The entries in the <adapter-name> subkeys under Adapters apply only to the network adapter represented by the subkey and they override any conflicting settings in the TCPIP\Parameters subkey.