VNC (Virtual Network Computing) Server is software that allows remote access and control of a computer desktop from another device over a network or the internet. It enables users to view and interact with the graphical desktop of a remote computer as if they were sitting in front of it. VNC is widely used for various purposes, such as providing technical support, accessing files and applications on remote computers, and remote collaboration.

Here’s how VNC Server typically works:

1. Installation: The computer that you want to control remotely needs to have VNC Server software installed. There are various VNC Server applications available, and some popular ones include RealVNC, TightVNC, UltraVNC, and TigerVNC.
2. Configuration: After installing the VNC Server, you may need to configure its settings, such as setting up a password for secure access, specifying which users can connect remotely, and choosing the level of access permissions (view-only or full control).
3. Port Forwarding (If required): If you want to access the VNC Server over the internet or a different network, you may need to set up port forwarding on the router to allow incoming VNC connections to the computer hosting the VNC Server.
4. VNC Viewer: To access the remote computer, you need a VNC Viewer application on the device you’ll be using to control the remote computer. VNC Viewer software is available for various platforms, including Windows, macOS, Linux, iOS, and Android.
5. Connection: Using the VNC Viewer, you enter the IP address or hostname of the computer running the VNC Server and provide the necessary authentication details (such as password) if required. Once connected, you’ll see the remote computer’s desktop on your local device.
6. Remote Control: With the VNC Viewer, you can interact with the remote computer as if you were physically present, controlling the mouse, keyboard, and accessing files and applications.

VNC is a versatile tool that offers flexibility for remote access across different platforms and devices. However, as with any remote access software, it’s crucial to implement security best practices, such as using strong passwords, keeping the software updated, and using encrypted connections, to protect against unauthorized access and potential security risks.