What is WIFI and what are the variations of WIFI?


Wifi router in an office background. 3d illustration

WIFI stands for Wireless Fidelity is generic term that refers to IEEE802.11 standard
for Wireless Local Networks (WLANs). 802.11 operates on either 2.4GHz
or 5GHz depending on its type. The network’s central point is the access point,
which is a router with transmitting antennas which route the transfer of data.
Wi-Fi access point to any Wi-Fi capable devices is about 100m outdoors and
50m indoors. The major types of Wi-Fi, named as 802.11b, 802.11a, 802.11g,
802.11n (WIFI 4), and 802.11ac (WIFI 5), and 802.11ax (WIFI 6). There will be a
new generation Wfi 7 under 802.11be target to launch in 2024.
WIFI Direct is a Wi-Fi standard for peer-to-peer wireless connection that two
individual devices establish a direct Wi-Fi connection without an intermediary
router. It can be found in WIFI printer and smart TV connection.
Wi-Fi CERTIFIED is an internationally recognized mark indicating that the products
met industry-agreed standards for interoperability, security, and a range
of application specific protocols. Certification means that a product has been
tested in a variety of ways to validate interoperability with other Wi-Fi certificated
product operating in the same frequency band. There are three certification
paths: FlexTrack, QuickTrack, and Derivative.