What is Wi-Fi?
Any Internet user today has met the �Wi-Fi� logo at least once and most likely knows that a sticker with him in a school or on the street means the coverage of the Wi-Fi wireless Internet network. This means that within a radius of 100 meters you can connect to the Internet over a wireless network - this is what gives us the standard of communication Wi-Fi.
Wi-Fi is really very deeply ingrained in our lives. Connecting to the Internet via Wi-Fi today is supported not only by computers and telephones, but also by the org. appliances, household appliances, and soon we will see the implementation of the system of "smart homes" and automotive autopilots.
Already today, almost every Internet user who knows what Wi-Fi is, puts a router in the house that creates a wireless network. If you have not got your access point to the wireless network, we recommend reading this article http://elhow.ru/internet/nastrojka-i-podkljuchenie-interneta/kakoj-router-vybrat-dlja-doma about choosing a router. Also useful will be this article, which explains how to connect to the Wi-Fi network.
The Wireless Ethernet Compability Alliance (Wi-Fi Alliance) is an alliance created by the largest manufacturers of wireless technology to support a single global standard for device compatibility. The organization was created in 1999 by companies such as 3Com, Nokia, Cisco (ex Aironet), Symbol Technologies and others. Today, the alliance includes 320 equipment development companies. They are jointly developing a standard for wireless networks Wi-Fi (short for Wireless Fidelity - "wireless accuracy" with Eng.). This standard works according to the IEEE 802.11 LAN specification.
IEEE 802.11 assumes connection over radio channels at the following frequencies:
- 0.9 GHz;
- 2.4 GHz;
- 3.6 GHz;
- 5 GHz.
At the moment, IEEE 802.11 is a collection of more than 28 radio standards, the most recent of which enable data transmission at speeds up to 600 Mbps at a distance of 300 meters.
Organizations in the alliance are constantly developing new communication standards within this specification to improve the quality of communication. The organization also conducts a compatibility analysis twice a year, during which it checks the equipment presented by the manufacturers for compatibility with the equipment of other manufacturers of the alliance and certifies it.If you see the Wi-Fi logo on the device, it means that it has been certified in the alliance and meets the standards of interaction.