Computer Network | LiFi vs. WiFi



Wi-Fi(wireless fidelity) and Li-Fi(light fidelity) both are two different technologies which are used to send and receive data wirelessly. In case of Wi-Fi we use Routers and Radio Frequency (RF) waves to transmit data, whereas in Li-Fi we use LED bulbs and Light signals to transmit and receive data.

Basic Difference between LiFi and WiFi:

Comparision Li-Fi Wi-Fi
Full form stand for light fidelity stands for wireless fidelity
Invented/Coined Coined by Prof. Harald Haas in 2011 By NCR corporation on 1991
Operation it transmits data using light by the help of LED bulbs it transmits data using radio waves using wifi router
Technology Present IrDA compliant devices WLAN 802.11/b/g/n/ac/d standard compliant devices
Data Transfer Speed About 1 Gbps Ranges from 150Mbps to maximum of 2Gbps
Privacy light is blocked by the walls hence provide more secure data transfer walls cannot block radio waves so we need to employ more techniques to achieve secure data transfer
Frequency of operation 10, 000 times frequency spectrum of the radio 2.4Ghz, 4.9Ghz and 5Ghz
Coverage Distance about 10 meters about 32 meters(vary based on transmit power and antenna type)
Data density work with high dense environment work in less dense environment due to interference related issues
Bare minimum Components used LED bulb, LED driver and photo detector Routers, Modems and access points
Applications Used in airlines, undersea exploration etc Used for internet browsing with the help of wifi hotspot



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