When you move between networks most of the times you are required to update your DNS so that connectivity to internet or to the server can be maintained. However doing it the traditional way has too many steps.
DNS exchangers lets you switch between predefined DNS or previously used DNS in just one lick and makes sure you save the 5 minute process to update the same thing in Windows.Since it remembers the previous DNS IP, You can always click change to switch back to earlier used DNS setting.
However if you have to change your IP, this will not be much of help. We would recommend you to use Net Con Manager which takes care of maintaining profiles if you keep switching to different office or work areas or you can use the NetSetMan to change IP address of all the network, you are connected to.
Download DNS Exchanger