Most modern implementations try to reduce this problem by sending only changed pixels. If the client and server are so disparate that they do not share any advanced encoding methods, then the raw screen will be sent from the server to the client pixel-by-pixel in left-to-right, order. The most basic form of VNC encoding uses the raw encoding method. A low resolution, grayscale screen can be transferred fairly quickly and work well over lower bandwidth connections. However, most VNC clients allow users to specify both the resolution of the remote screen (the screen size) and also the color depth to use. In low bandwidth situations, this may cause an issue. Cons of VNCĭue to the basic way in which VNC works, it uses a lot of bandwidth to transfer desktop images to the client. A specific operating system client and server application needs to exist, though, but there are VNC client and server applications for virtually every operating system imaginable, including mobile phones, these days. VNC is essentially platform independent because the mechanism used to transport desktop images and keyboard presses back and forth exists under the operating system. It operates on a very robust, but simple, protocol called the Remote Framebuffer Protocol, which we discuss in more detail later on. VNC is a very mature product that has been in development since the 1990s.
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VNC is particularly useful for support because the person receiving the support can watch what is happening, and even interact when necessary, such as when required to enter a password that the support person does not know. Many companies use VNC in their internal IT departments to assist with routine tasks, and there are a lot of third party support companies that use VNC as well. It allows a remote technician to control your desktop as if they were onsite, and it requires almost no knowledge on the part of the person requiring support. VNC is the perfect solution for remote tech support.
Some cloud providers offer the ability to launch a temporary VNC instance to allow remote access to the console in those cases. When access to servers is completely remote, it’s possible to lose access to a server via the normal means. It’s also quite common today for parts, or all, of a company’s networking infrastructure to be located offsite sometimes very far away in a cloud somewhere. Having VNC access to work computers removes the necessity to have physical access to a computer and can help work continue during these times.
There are many disasters that can occur which make physical access to a workplace impractical. Instead, they can always just log in to their work computer and the company data never has to leave the premises. This provides some security because employees don’t need to take company documents and emails with them in order to respond to after-hour issues. Many companies allow workers to remotely access their desktops while away from the office using VNC. VNC is primarily used in two ways these days: to remotely access a work desktop from home (or other location), or to allow remote technical support people to take over a computer for support activities. Deeper dive into the Remote Framebuffer Protocol (RFB).The fundamental difference between the two is that your computer joins a remote network when using a VPN, whereas you can only view and use a remote computer when using VNC. Rather, you use your own desktop to access the resources that exist on that network, such as printers, network drives, and internet connections. Users at the remote site can see what the remote user is doing, and even interact with them.īy contrast, a Virtual Private Network (VPN) simply connects you to a remote network, but does not provide a desktop for you to use. Any resources that are available at the remote computer, such as printers and network drives, are available.
VNC provides remote control of a computer at some other location allowing users to operate that computer as if they were sitting in front of it. The terms Virtual Network Computing (VNC) and Virtual Private Networking (VPN) sound similar but are very different things.
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