Virtual Network Computing (VNC) allows users to access and control a remote computer over a network. It works by having a VNC server on the remote computer and a VNC viewer on the local computer. The viewer connects to the server's port and the server sends rectangular frames of the desktop buffer to the viewer. VNC offers advantages like eliminating distance constraints and enabling remote troubleshooting, but has disadvantages like using bandwidth and only allowing one-way communication on cellular networks. It provides graphical desktop sharing across platforms with AES encryption and is widely used with servers like RealVNC, TightVNC, and UltraVNC.

1. VIRTUAL NETWORK
COMPUTING
Presented By:
Rashmi 123003
Tanvi Dutta 123018
Bidisha Mukherjee 123004
Mala Kumari 123011
Nayan Kumari 123010

2. INTRODUCTION
• ABOUT VNC
• TYPES OF VNC
• WORKING MECHANISM
• ADVANTAGES AND DISADVANTAGES
• SECURITY
• FUTURE SCOPE
• CONCLUSION

3. ABOUT VNC
• Remote control system.
• Graphical desktop sharing system.
• Cross platform capable.
• AES encryption.
• Dedicated support Channel.

4. TYPES OF VNC SERVER
• Real VNC
• Tight VNC
• Vino
• Chromi VNC
• Ultra VNC

5. WORKING MECHANISM
To connect and control one computer from another
• VNC server
• VNC viewer
• VNC protocol

6. Viewer connects
to a port on the
server (default
port 5900)
Server connects
to the viewer
through the
“listening
mode” on port
5500
Server sends
small
rectangular
frame buffer to
the client
After the
original full
screen has been
transmitted, the
rectangles
which changes
are send to the
client by raw
encoding

7. • Rectangles of Frame Buffer.
• A lot of Bandwidth used
• Negotiation for encoding
• Simplest Encoding
• Works well with small screen change.

8. ADVANTAGES & DISADVANTAGES
ADVANTAGES
• Eliminates distance
constrain.
• Automated trouble
shooting,Diagnosing and
repairing.
• Saves energy
• Virtual files are easy to
back-up.
DISADVANTAGES
• a one way communication
for cellular phones.
• Unidirectional flow of
control.
• Expensive
• RFB 3.X or lower

9. SECURITY
• Password.
• SSH Encryption.
• Virtual Machine.
• Isolation.

10. FUTURE SCOPE
• implementing VNC over internet.
• developed for tablets and other handheld
devices.
• Access to computer using mobile phones.

11. CONCLUSION
• the extended scope of this system will prove
to be helpful in providing mobility and
accessing the remote desktop over the
internet

12. THANK YOU