Technologies
Wi-Fi
www.wi-fi.org
"Simply put, Wi-Fi is connectivity.
At home, Wi-Fi connects you to your favorite content and communications over your mobile phone, computer, media players and other devices - all without cumbersome cables.
When you're on the move, Wi-Fi let's you connect to the Internet or your office from an airport or coffee shop and helps you stay productive when you're away from home.
A Wi-Fi network can be used to connect electronic devices to each other, to the Internet, and to wired networks which use Ethernet technology.
Wi-Fi networks use radio technologies called 802.11 to provide secure, reliable, fast wireless connectivity.
To date there have been four Wi-Fi generations of products available, and more standards are in the works for adding future features and enhanced performance and security.
Each generation is defined by a set of features that relate to performance, frequency and bandwidth.
Each generation also furthers security enhancements and may include other features that manufacturers may decide to implement.
Wi-Fi products operate in the 2.4GHz or 5GHz bands.
hese bands are designated as "license-free", which indicates that individuals may use products designed for these bands without a government license, such as those that are granted to TV or radio transmissions within licensed bands.
Because the Wi-Fi bands are "license free", it becomes more important for manufacturers to ensure that their products pass the standards of interoperability set by the Wi-Fi certifications.
And because they also share these bands with non-Wi-Fi products, such as remote control toys, certification testing ensures that Wi-Fi products are good neighbors and will not interfere with signals from these devices. "