Wi-Fi vs Li-FiPresented By:
Shining stars
JAWAD ABRAIZ KHAN MUHAMMAD UMERQASIM ANWAR CHGULAM ABBASABDUL MAJID
SUPERIOR UNIVERSITY SIALKOT
• Uses Radio Waves.
• Maximum speed: 1Gb/s.
Wi-Fi
• Uses Light waves.
• Maximum speed 10Gb/s.
Li-Fi
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.
How Wi-Fi works?
ISP
Computers
Wi-Fi Router
Mobiles Any Wireless Device
How Wi-Fi Works?
Different Wi-Fi standards
IEEE 802.11 a Introduced in 1999. Frequency: 5 GHz. Range : 10m. Speed: 54 Mbits/s.
IEEE 802.11 b Introduced in 2001. Frequency: 2.4 GHz. Range : 50 m. Speed: 11 Mbits/s.
IEEE 802.11 g Introduced in 2003. Frequency: 2.4 GHz. Range : 75 m. Speed: 54 Mbits/s
IEEE 802.11 n Introduced in 2007. Frequency: 2.4 GHz & 5 GHz. Range : 100-150 m. Speed: 300 Mbits/s.
IEEE 802.11 ac Introduced in 2013. Frequency: 5 Ghz. Range: 150 m. Speed: 1 Gbits/s.
Wi-Fi network topologies AP based topology.
Peer-to-peer topology.
Point to multipoint bridge topology.
AP based technology
Peer-to-peer Topology
Point to multipoint Topology
Advantages• Free of wires.• Easy Implementation.• Mobility.• Cost is less.
Disadvantages• Limited Capacity.• Limited Availability.• Limited Speed.• Insecure.• Harmful.
Electromagnetic Spectrum
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
How Li-Fi works?
How Li-Fi overcomes Wi-Fi
CAPACITY EFFECIENCY
AVAILABILTY SECURITY
Applications• Underwater.• Hospitals & Medicare's.• Aircrafts.• Petrochemical Plants & many more….
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