How does wi-fi work?

Wi-Fi is a modern wireless technology.Connect computers, laptops and smartphones to one network and connect them to the Internet. More information about Wi-Fi, how to configure it on your computer, you can read in the article What is wifi.

How Wi-Fi works

Wireless connection of computers to the networkInternet is due to the use of radio waves and the principle of operation does not differ from the work of radio stations, cell phones and television receivers. The only significant difference between Wi-Fi is the use of higher frequencies than in radio communications and television broadcasts (2.4 GHz or 5 GHz). Work at such frequencies and allows you to transmit large amounts of information.

For wireless access toInternet you need a router (router) with a built-in radio signal reception and transmission module and a similar module installed in a computer or laptop. The router connects to the Internet via a network cable through any provider. By cable, a digital signal from the Internet is fed to the router, where it is converted into radio waves. The router sends a radio signal to the computer receiving module, which again converts it to digital. Similarly, the digital signal from the laptop is encoded by the transmission module into the radio signal, transmitted "over the air" to the router, converted there to digital and sent to the worldwide network.

How does a Wi-Fi router work?

Routers are capable of transmitting a signal fromthe Internet more than one device. This allows one network cable to connect to the Internet from a desktop computer, laptop, tablet, etc. The range of modern routers is 50-100 meters (in the absence of obstacles). This allows a person to move freely around the apartment with a mobile device, without losing any connection with the World Wide Web.

The router memory contains a routing table, inwhich stores the paths to all connected devices. The width of the Internet access channel provided by the provider is also distributed among all mobile and fixed devices. It should be noted that the connection via Wi-Fi through the router is convenient for communication in social networks or via Skype, e-mail viewing, Internet surfing. For online viewing of bulk video or downloading files, a network connection is more suitable.

How Wi-Fi works on a laptop

Most modern laptops are equipped withbuilt-in radio signal reception and transmission module that supports Wi-Fi connection to the Internet. These devices, as a rule, have a sticker with the logo of Wi-Fi. Network equipment for wireless connections is made by many companies using different technical solutions for this. However, the presence of the Wi-Fi logo tells consumers that manufacturers use a common communication standard, and devices from different companies will be mutually compatible, that is, they can work with each other on the same network.

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