Light Fidelity or Li-Fi is a Visible Light Communications (VLC) system that works with wireless communications that travel at very high speeds.
Li-Fi uses common LEDs (light-emitting diodes) to allow data transfer, with speeds up to 224 gigabits per second.
The term Li-Fi was coined by Professor Harald Haas of the University of Edinburgh during a TED talk in 2011. Haas provides light bulbs that could act as wireless routers.
Wi-Fi or WiFi is a technology for wireless local area networks with devices based on IEEE 802.11 standards. Wi-Fi is a trademark of the Wi-Fi Alliance, which restricts the use of the term Wi-Fi Certified to products that successfully complete interoperability certification tests.
Devices that can use Wi-Fi technology include personal computers, video game consoles, smartphones, digital cameras, tablets, digital audio players and modern printers. Wi-Fi compatible devices can be connected to the Internet via a WLAN and a wireless access point. This hotspot has a range of about 20 meters (66 feet) indoors and a wider outdoor range. Access point coverage can be as small as a single room with walls blocking radio waves, or as large as many square miles achieved by using multiple overlapping access points.
Representation of a device that sends information wirelessly to another device, both connected to the local network, to print a document
Wi-Fi most commonly uses the 2.4 gigahertz (12 cm) UHF and 5 gigahertz (6 cm) SHF ISM radio bands. Having no physical connections, it is more vulnerable to attack than wired connections, such as Ethernet.