TOPIC

The Internet is the worldwide network of interconnected computers and many kinds of devices that utilize the Internet protocol suite that connects billions of devices around the world. Internet consists of a huge number of private, scholastic, academic, business, and government networks of nearby to worldwide extension. The internet connection is mainly wire based and wireless. The wireless connection is more popular now days because it is easy to connect devices especially in portable notebook devices. The name of Wi Fi comes from wireless networking technology that uses radio frequency spectrum to deliver high speed internet connection. Wi-Fi innovation utilized to give Internet access to various kinds of devices that are inside the area of a wireless system and these devices are connected with the Internet. The scope of one or more interconnected access points (hotspots) can stretch out from a range as little as a couple rooms to as extensive the same number of square kilometres. Covering in the bigger territory may require a gathering of access focuses with covering scope. On the other hand, using light for communication is nothing new. Ancient Chinese fighters utilized fire signal along the Great Wall to caution each other of an approaching attack. Laser pillars have been utilized for short-go voice and information transmission in observable pathway and fiber-optic applications for quite a long time. Presently, expanding on a thought initially proposed by University of Edinburgh teacher Harald Haas, exploratory groups and new businesses are putting a 21st century turn on the thought, piggybacking high speed Internet access onto normal room lighting. The li fi technology takes advantage of LED lighting.
Wi-Fi and Li-Fi both are wireless connection networks. Li-Fi uses light waves instead of radio frequency which is used in Wi-Fi. The report of Yunlu Wang and Haas (2015) showed that the expanding number of multi-media cell phones, computers and the expansive utilization of data-demanding applications implies that present systems are at their most extreme limit because of the constrained accessibility of the radio frequency (RF) spectrum. Wi-Fi is incredible for wireless communication inside structures, and Li-Fi is perfect for high thickness wireless data scope in restricted area and for alleviating radio impedance issues (Goyalo et all., 2013). The data transmission rate of Wi-Fi is 5.5 to 11Mbps. whereas, the genuine rate of Wi-Fi (IEEE802.11n) is more like 150Mbps. While Li-Fi has the capability of a hypothetical speed of 10Gbps, implying that a full HD film could download in only 30 seconds. The report of Sonnad et all., (2013) showed that radio recurrence goes through dividers and roofs, along these lines, hypothetically a programmer outside a building can get to the Wi-Fi arrange effectively. Then again, Li-Fi innovation utilizes light and light waves don't infiltrate through dividers and roofs.
Li-Fi uses visible light for wireless communication. All of the homes and workplaces have LED bulbs for the lighting purposes and the same LED bulbs can be utilized to transmit data. It is extremely effective as far as expenses and additionally saving energy. Light is used for transmitting data so that light is not required for home and offices (AbdulhussainShuriji, 2014). The report of insights (2016) examined that Li-Fi can enter the water and do work effortlessly for internet connection. People are doing research inside the water, they can use Li-Fi for wireless communication whereas others cannot.