By Hester Twitter / Last Updated June 1, 2023

VNC: what is it?

VNC: what is it? VNC refers to Virtual Network Computing. It is a cross-platform screen sharing technology designed to remotely control another computer. This means that users can operate a remote computer's screen, keyboard, and mouse at a distance from another device as if they were seated right in front of it.

The system includes clients and servers, which are mostly available for GUI-based operating systems.


What is a VNC client?

What is VNC client? The VNC client, which uses the TCP/IP protocol and offers various control operations, might be better referred to as a viewer.

It refers to local computers or mobile devices you want to control from. A computer or mobile device with VNC software installed can connect to and operate a computer in another location.

What is a VNC server?

A server is a component of computer software or hardware that offers features to other programs referred to as "clients." This is known as the client-server model, where a server can offer services to one or more clients, such as resource or data exchange. In this way, one server can serve several clients, and one client can remotely access many servers.

Server End

How does VNC work?

VNC uses the remote frame buffer (RFB) protocol to grab and transfer screen graphics frame buffers. It saves bandwidth and transmission while transferring changes from the VNC server screen to the VNC client.

When a client and a server establish a connection for the first time, the server uses a challenge-response system to request authentication from the client, which frequently requires the user to provide a password at the client end.

After that, the server and client communicate to determine the desktop size, pixel format, and encoding techniques to be utilized. The client then requests that the full screen be updated, and the session starts.

How VNC Works

What does VNC do?

►It allows you to operate another computer remotely (known as the server).

►It shows the desktop of the remote computer on your screen.

►It transmits your keyboard and mouse inputs to the distant computer.

►It uses a server program for the machine to be controlled and a client/viewer program for the controlling device.

►It serves as the foundation for many remote desktop applications.

What are similarities and differences between VNC and RDP?

RDP is a Windows built-in remote access tool that is widely used among users. RDP and VNC have similar goals, but they differ in many features. Here are the similarities and differences between VNC and RDP.


• Both enable users to connect to remote computers from different places.
• Both require client-side and server-side software to function.
• Both rely on peer-to-peer communication, which enables a direct connection between a local computer and a distant computer.
• Both support software that provides safe access and allows administrators to manage users.


• VNC supports multiple sessions. RDP is often meant for 1:1 use.
• VNC server is compatible with Windows, Mac, Linux, and Raspberry Pi-based computers. RDP server only works with specified Windows operating systems, making it incompatible.
• VNC is a screen-sharing application that allows the remote computer to take control. RDP connects into the computer and creates a virtual desktop session so that users can share the resources of the same computer, but it is not a screen-sharing platform.
• VNC enables connection in different networks. RDP requires a VPN or port forwarding to be used over the Internet.
• VNC is better suited to assist remote work or troubleshooting use cases. RDP has limited functionality.

AnyViewer - Best VNC solution for Windows

After learning VNC what is, you may look for remote desktop software with VNC technology. Here we recommend you use AnyViewer for the following advantages:

Safe. It is secured by ECC encryption, protecting your data from leakage.
Stable. It is developed by a professional technical team, helping you to complete a stable connection with high image quality.
All-in-one. It supports remote control, file transfer, multiple sessions, multiple monitor control, etc.
Flexible. It has flexible connection methods. For example, it allows both attended and unattended remote access.
Built-in chat. It offers an instant chat box in a remote session.

Download, install, and launch AnyViewer on your devices:

Download Freeware Win 11/10/8.1/8/7
Secure Download

Step 1. On remote computer, go to Log in, and click Sign up.

Log in AnyViewer

Step 2. Fill the information and click Sign up.

Sign Up for AnyViewer

Step 3. On your local computer, log in to the same account, and it will display the assigned devices.

Free Editions

Step 4. Go to Device, select the computer you want to connect to. Then you can perform the following one-click operations.

You can achieve one-click control, view the screen, file transfer, or lock/reboot/shut down the remote PC.

Connect to My Devices

Bonus tip: Upgrade to a Professional or Enterprise plan to enjoy more rights!
Assign more devices. A free account has 3 assigned devices, while Pro/Enterprise supports 10/100 assigned devices.
More connection channels. The Enterprise version allows 10 channels.
More simultaneous sessions. An professional or Enterprise plan can enjoy 5/10 simultaneous sessions.
Connect in privacy modeIt will better protect your privacy by blacking the remote PC and disabling the remote keyboard & mouse.
High-speed file transfer. Transfer unlimited files at once at a higher speed of up to 10 MB/s.


VNC: What is it? After reading this post, you may have a further understanding of VNC. We also mentioned professional remote access software AnyViewer, it could be the best choice if you are looking for a VNC solution.