It's actually VNC & RDP. VNC is an open-sourced method of remotely controlling a desktop-based environment on all platforms including Windows, Linux, MacOS and Mobile devices as well. RDP is the closed-source built-in method that Microsoft has implemented for the remote control of Windows based server platforms.
From time to time I see you posting on forums asking questions that answers should be known by any company involved in the industry, might I ask how long LeasedLayer has been in business? Either you're a new company and are still trying to learn the ropes, or you're trying to start discussions. The second option is one that I would hope is the answer to mine, however, rather than asking the questions, why not help out the community by educating others instead?