X-windows system, forwarding the display from the server to the PC.
Software must be installed on the PC to make this link work and the best software (so far) for this task is the PuTTy terminal emulator and the Xming X-window client.
PuTTy can be downloaded from http://www.chiark.greenend.org.uk/~sgtatham/putty/
Xming can be downloaded from http://sourceforge.net/project/downloading.php?group_id=156984&filename=Xming-6-9-0-31-setup.exe
Once Xming is installed, run the application called ‘XLaunch’ and verify that the settings are as shown:
Save the configuration and close XLaunch
After installing PuTTy, double-click on the PuTTy icon on the desktop and configure as shown:
The most important setting is the X11 Forwarding.
Without that set, the X-window system cannot find your PC for display
ref; www.geo.mtu.edu (pictures token)