Which statements about VNC are correct?

The statement regarding the VNC server is correct because, for a computer to be controlled remotely using VNC (Virtual Network Computing), it must have server software installed. This software acts as an intermediary that allows the controller (the client) to access and manipulate the desktop environment of the controlled machine. Without this server component, the VNC system cannot function since the client needs to connect to a server in order to establish a remote session.

The other statements do not accurately reflect the characteristics of VNC. VNC is not limited to Windows operating systems; it can also operate on various other systems such as Linux or macOS. Additionally, the complexity of VNC can vary depending on the implementation and needs of the user; it is often considered user-friendly, rather than complex. Lastly, the controlling machine (the VNC client) typically requires compatible software to connect to the VNC server, so it is inaccurate to suggest that it does not need any software at all.