VIRTUAL NETWORK COMPUTING SUBMITTED BY:- Ankur Yadav Ashish Solanki Charu Swaroop Harsha Jain

WHAT IS VNC In computing, Virtual Network Computing (VNC) is a graphical desktop sharing system to remotely control another computer. It transmits the keyboard and mouse events from one computer to another, relaying the graphical screen updates back in the other direction, over a network.

Continued… VNC is platform-independent – a VNC viewer on one operating system may connect to a VNC server on the same or any other operating system. There are clients and servers for many GUI-based operating systems and for Java. Multiple clients may connect to a VNC server at the same time. Popular uses for this technology include remote technical support and accessing files on one's work computer from one's home computer, or vice versa

A VNC system consists of a client, a server, and a communication protocol. The VNC server is the program on the machine that shares its screen. The server passively allows the client to take control of it The VNC client (or viewer) is the program that watches, controls, and interacts with the server. The client controls the server.

OBJECTIVE It is a graphical desktop sharing system. It allows user to simultaneously use two terminals It is very useful in all places where people working at different terminals need to access other terminals for various purposes.

EXAMPLE For example, the team members of a software development team can access to each other work on their desktop if connected over a network even they are not present physically with each other.

WORKING The project contains two modules. The Client side and Sever side. The Client side from where user can operate sever/remote machine. The server is considered as remote machine.

The sever start execution and waits for connection with some client. When the client start it requires the IP address of Server/ Remote machine. After getting IP address the connection between and remote machine is established. First the server captures the desktop and send to client with some processing.

The client receives image and display it because of that the user can see remote machine desktop. Now when user does some operation events are created which then transferred to the server side. The server receive event and fires it on its desktop or machine so whatever user does at the client side is reflected at the sever side as appropriated action performed on the sever side. The server send back the new desktop with to some changes to client side.

DIAGRAMS

DATA FLOW DIAGRAM:-

USE CASE DIAGRAM:-

SEQUENCE DIAGRAM

SERVER STARTED This is the page when server is being run on the server machine.

CLIENT STARTED This is the page when client get started on its machine.

SERVER NAME This is the page which is basically opened on the client machine when it request for the server’s IP address.

REMOTE CAPTURING Server Desktop Visible on Client Machine

REMOTE CAPTURING These are the pages when desktop sharing is successfully done.

FUTURE ENHANCEMENT The project can be enhanced to run the applications on the client/Server machine. Currently the project is restricted to only one client machine. The project can be enhanced to contain screens of more than one client/Server.

This project can be enhanced to send an acknowledgement to the server machine to let the server know the whether the image was successfully received by the client.

HARDWARE and SOFTWARE REQUIREMENTS  Hardware Requirements: Intel Processor Hard Disk Drives 16MB Ram  Software Requirements: Operating System(windows 9x) JVM(JDK1.4.1)

CONCLUSION The VNC protocol provides an excellent, lightweight means of remotely controlling GUI COMPONENTS. It is available on multiple platforms. It has a number of performance features, including enable detection of line speed and selection of compression appropriate to the connection. Some implementations offer integration into the host operating system for user authentication purposes. However, VNC is not a secure protocol, and care must be taken to avoid compromise of a machine running VNC, and possibly the entire network once a single machine is compromised.