Transcript WHAT IS VNC - 123SeminarsOnly.com

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
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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.