Slides For IT Engineering.

2. Wi-Fi vs Li-Fi
Presented By:
Shining stars
JAWAD ABRAIZ KHAN
MUHAMMAD UMER
QASIM ANWAR CH
GULAM ABBAS
ABDUL MAJID
SUPERIOR UNIVERSITY SIALKOT

3. • Uses Radio
Waves.
• Maximum
speed:
1Gb/s.
Wi-Fi
• Uses Light
waves.
• Maximum
speed
10Gb/s.
Li-Fi

4. What is Wi-Fi?
 Wi-Fi stands for Wireless Fidelity.
 Fidelity: A faithful output.
 Generally used to connect devices in wireless mode.
 It is a term that refers to IEEE 802.11 communications.

5. How Wi-Fi works?
ISP
Computers
Wi-Fi Router
Mobiles
Any Wireless
Device

6. How Wi-Fi Works?

7. Different Wi-Fi
standards

8. IEEE 802.11 a
 Introduced in 1999.
 Frequency: 5 GHz.
 Range : 10m.
 Speed: 54 Mbits/s.

9. IEEE 802.11 b
 Introduced in 2001.
 Frequency: 2.4 GHz.
 Range : 50 m.
 Speed: 11 Mbits/s.

10. IEEE 802.11 g
 Introduced in 2003.
 Frequency: 2.4 GHz.
 Range : 75 m.
 Speed: 54 Mbits/s

11. IEEE 802.11 n
 Introduced in 2007.
 Frequency: 2.4 GHz & 5 GHz.
 Range : 100-150 m.
 Speed: 300 Mbits/s.

12. IEEE 802.11 ac
 Introduced in 2013.
 Frequency: 5 Ghz.
 Range: 150 m.
 Speed: 1 Gbits/s.

13. Wi-Fi network topologies
 AP based topology.
 Peer-to-peer topology.
 Point to multipoint bridge topology.

14. AP based technology

15. Peer-to-peer Topology

16. Point to multipoint Topology

17. Advantages
• Free of wires.
• Easy Implementation.
• Mobility.
• Cost is less.

18. Disadvantages
• Limited Capacity.
• Limited Availability.
• Limited Speed.
• Insecure.
• Harmful.

19. Electromagnetic Spectrum

20. What is Li-Fi?
• Li-Fi stands for Light Fidelity.
• Uses light instead of radio waves.
• Uses Visible part of electromagnetic spectrum.
• Also known as Light based Wi-Fi.
Harald Hass

23. How Li-Fi works?

24. How Li-Fi overcomes Wi-Fi
CAPACITY EFFECIENCY
AVAILABILTY SECURITY

25. Applications
• Underwater.
• Hospitals & Medicare's.
• Aircrafts.
• Petrochemical Plants & many more….

29. DO
YOU
HAVE
ANY
‘
QUESTIONS ’
ABOUT
THIS
TOPIC