What do you mean by Virtual Network Computing

[Neel21]

Hi Guys,

I want to know that what do you mean by Virtual Network Computing ? What is VNC uses and how does one vnc? Is it compatible with Window 7 ?

[Astalavista]

Virtual Network Computing (VNC) allows use of a remote computer exactly as if it was in front of him: The mouse movements and keystrokes on the keyboard are transmitted over the network to the remote computer for fly, back a screen image of the remote computer is sent at regular intervals. VNC consists of two parts: one resident software (WinVNC) that installs on a remote client software (VNC Viewer) that allows access. The setting is minimalist and sufficient to implement the server portion of VNC to specify a password that protects access to the remote machine. On the client side, it connects to the remote machine are specifying chosen IP address and password previously.

[Tomaz]

Virtual network computing, using a protocol RFB (Remote FrameBuffer). Management may involve sending keystrokes on the keyboard and mouse movements from one computer to another, relaying the screen via a computer network. The system is platform VNC: VNC-client, called the VNC viewer, running on one operating system can connect to the VNC-server running on any other OS. There are clients and the server side for virtually all operating systems, including for the Java (including mobile platform J2ME). To one VNC-server can simultaneously connect to multiple clients. The most popular ways to use VNC - a remote technical support and access to work computer from home.

[Samra]

To use VNC, you need a TCP / IP, a VNC server (vncserver) and a VNC client (vncviewer) to connect to the machine on which VNC server is active. The X-based VNC server works according to client - like X server In fact you have two servers in one: an X server and a VNC server. This allows to keep the same number of display for the X server and VNC server. To connect to a VNC server, must provide the name of the machine and display number. The command looks like "vncviewer: 2". That is, if the X server has the number 2, the VNC server will have the number 2. From the client, the viewer can connect to the server using this number. If a user works on display number 1 and plug into the number 2, you will not realize that working on your machine. VNC is able to find the first available display number and report, but nothing prevents you from using another number. If vnc server gives the number 2, can connect on display 3.4 ... if you want this number to start the viewer.

[X-Ray]

VNC is based on the protocol Remote Frame Buffer (RFB) is very simple, with features such as "Insert a rectangle of pixel at position x, y given However, the server sends small rectangles from the framebuffer to the client. This method, in its simplest form, using lots of bandwidth there are several methods for reduce such use. For example, there are several forms of encoding methods to determine which way is most effective in reducing it. The Remote Frame Buffer protocol allows the client and server to agree on the encoding method used. The simplest encoding, which is supported by all clients and servers, is the raw encoding where the pixels are transmitted from left to right by row and after the first screen transferred, only the rectangles that change is sent. Because of this, this method works very well if only a small amount the screen changes to an image to another (like a mouse pointer that moves on the desktop, or typed text), but the bandwidth usage increases significantly if many pixels change and therefore must be transmitted (a video in full screen is the best example).

[Stephanatic]

By default, VNC is not a secure protocol. VNC can be used through a tunnel through a VPN or SSH connection, which adds another layer of security with better encryption However, this is not always a viable solution, for example, an SSH tunnel can be difficult to do with Windows machines. UltraVNC allows the use of a plugin open-source encryption solution that encrypts the VNC session complete, including identification password, and data transfer. It also allows for identification based on user accounts NTLM and Active Directory. RealVNC offers powerful encryption in its commercial version.