In addition to this Transmission supports network-based remote control, whereby an authorised user may control the Transmission core from another machine via the [Transmission JSON RPC protocol](rpc-spec.md).
To make remote control easier from an arbitrary machine, Transmission Core can also serve a javascript web application to any browser and which in turn makes JSON RPC calls back to the Transmission core.
The Core components and methods of control are shown below:
From the above diagram it can be seen that a Transmission Core may be controlled by the following:
* _Local_ directly linked GUI (OS X, GTK+)
* _Local_ or _Remote_ Qt GUI
* _Local_ or _Remote_ Command Line Utility
* _Local_ or _Remote_ Transmission Web Application running in a web browser
The multiple methods of controlling Transmission and the various native GUIs available result in several different Transmission products as shown in the figure below:
Note. Although the diagram shows "Transmission Desktop Qt" as being Qt GUI + Transmission Core, the Qt component may be packaged on its own as a purely remote tool.
