Basic Wi-Fi Introduction

What is Wi-Fi?

Wi-Fi is wireless connectivity, providing connectivity between Wi-Fi devices.
A Wi-Fi network can connect multiple devices to each other.

Wi-Fi can connects you to your favorite content and communications.
A Wi-Fi network can connect computers, media and display devices together
to share hardware and media resources such as printers, audio files and Internet access.
You can easy share files and access internet from your mobile phone or computer.
All of this without a lot of wires to flexibilty for your move.
For basic Wi-Fi if you want to connect wireless devices, you just need a single access point.
The devices do not communicate directly, but the go through the access point.

Frequency Band

How Wi-Fi operated ? Wi-Fi products operate over radio waves,
in the same way as your cell phone, TV, radio etc.

Wi-Fi products operate in the 2.4GHz or 5GHz bands.
These bands are designated as "license-free", which indicates that individuals may use without a government license.
Because the Wi-Fi bands are "license free", it becomes more important for products must 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.

Wi-Fi Generations

Wi-Fi Technology	Frequency Band	Bandwidth or maximum data rate
802.11a	5 GHz	54 Mbps
802.11b	2.4 GHz	11 Mbps
802.11g	2.4 GHz	54 Mbps
802.11n	2.4 GHz, 5 GHz (selectable or concurrent)	450 Mbps

Wi-Fi CERTIFIED products will contain a logo identifying
which features have been tested and that the product has met all the standards of the notation