Virtual Network Computing is basically a server and a viewer. But the VNC remote display is fundamentally different from multi user technology. The communication is via TCP / IP on a single socket, the internet is not a problem and provided the firewall on the computer allows it. VNC works well and it employs several techniques to minimize network traffic as it transfers graphical information.The beneficial part of this VNC is that all remote users including the administrator see the same thing. Security has been a major concern in networking as data can be hacked or there are chances of unauthorized access. But the major advantage of the Virtual Network Connection is that it needs a password to make a connection. And the password is never transmitted over the network. the reason why the password is not transmitted is that VNC uses Challenge response Scheme for authentication. So VNC is completely secured and highly useful in communication aspects of technology.