Wi-fi

Wi-Fi is a technology that allows electronic devices to connect to a wireless network, typically using the 2.4 gigahertz (12 cm) UHF and 5 gigahertz (6 cm) SHF radio frequency bands.

History

The term Wi-Fi was first used commercially in August 1999. It was developed by a group of major companies, including AT&T, Intel, Cisco, Nokia, and 3Com, who formed the Wireless Ethernet Compatibility Alliance (WECA).

Technology

Wi-Fi technology is based on the IEEE 802.11 family of standards, which are commonly used for local area networking of devices and Internet access. Wi-Fi most commonly uses the 2.4 gigahertz (12 cm) UHF and 5 gigahertz (6 cm) SHF ISM radio bands.

Security

Security is a serious concern in connection with Wi-Fi. There are several methods used to protect Wi-Fi networks, the most common of which are WEP and WPA.

Applications

Wi-Fi allows local area networks (LANs) to operate without cables and wiring, making it a popular choice for home and business networks. Wi-Fi can also be used to create Wireless Access Points in public places like cafes, hotels, and libraries.

See also

• Wireless LAN
• Mobile device
• Hotspot (Wi-Fi)
• Wireless security

References

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