What do the letters; WI FI stand for ?

It came from Hi-Fi... which stands for High Fidelity

The Institute of Electrical and Electronics Engineers used it as a play on the word and created: Wi-Fi and yes it stood for Wireless Fidelity.

A Non-Profit Group created the WiFi Alliance to certify WiFi Devices.

This Group did not Create or develop IEEE 802.11 they only help sell WiFi devices.

Not every IEEE 802.11-compliant device is submitted for certification to the Wi-Fi Alliance, sometimes because of costs associated with the certification process. The lack of the Wi-Fi logo does not necessarily imply a device is incompatible with Wi-Fi devices.

It always stood for Wireless Fidelity until the Alliance came along and got it registered as a Trademark which is why it stands for absolutely nothing now due to the fact the Alliance makes money off if and doesn't want to be sued.

The letters "wi-fi" don't stand for anything. It's just a play on the earlier term Hi-Fi (high fidelity) audio.

It's been reversed to stand for "wireless fidelity" but that's not where the name came from.

Wireless Fidelity

This should answer your question: From Wikipedia, the free encyclopedia

For the radio station, see WIFI (AM).

Wi-Fi Wi-Fi Alliance Logo.svg

Developed by Wi-Fi Alliance

Compatible hardware mobile phones, personal computers, gaming consoles

Part of a series on

Antennas

Montage of four professional US omnidirectional base-station antennas

Common types, Components, Systems.

Antenna farm Amateur radio Cellular network Hotspot Municipal wireless network Radio Radio masts and towers Wi-Fi Wireless

Safety and regulation Radiation sources / regions, Characteristics, Techniques.

Wi-Fi or WiFi is a technology that allows electronic devices to connect to a wireless LAN (WLAN) network, mainly using the 2.4 gigahertz (12 cm) UHF and 5 gigahertz (6 cm) SHF ISM radio bands. A WLAN is usually password protected, but may be open, which allows any device within its range to access the resources of the WLAN network.

The Wi-Fi Alliance defines Wi-Fi as any "wireless local area network" (WLAN) product based on the Institute of Electrical and Electronics Engineers' (IEEE) 802.11 standards.[1] However, the term "Wi-Fi" is used in general English as a synonym for "WLAN" since most modern WLANs are based on these standards. "Wi-Fi" is a trademark of the Wi-Fi Alliance. The "Wi-Fi Certified" trademark can only be used by Wi-Fi products that successfully complete Wi-Fi Alliance interoperability certification testing.

Devices which can use Wi-Fi technology include personal computers, video-game consoles, smartphones, digital cameras, tablet computers and digital audio players. Wi-Fi compatible devices can connect to the Internet via a WLAN network and a wireless access point. Such an access point (or hotspot) has a range of about 20 meters (66 feet) indoors and a greater range outdoors. Hotspot coverage can be as small as a single room with walls that block radio waves, or as large as many square kilometres achieved by using multiple overlapping access points.

Depiction of a device sending information wirelessly to another device, both connected to the local network, in order to print a document.

Wi-Fi is less secure than wired connections, such as Ethernet, precisely because an intruder does not need a physical connection. Web pages that use TLS are secure, but unencrypted Internet access can easily be detected by intruders. Because of this, Wi-Fi has adopted various encryption technologies. The early encryption WEP proved easy to break. Higher quality protocols (WPA, WPA2) were added later. An optional feature added in 2007, called Wi-Fi Protected Setup (WPS), had a serious flaw that allowed an attacker to recover the router's password.[2] The Wi-Fi Alliance has since updated its test plan and certification program to ensure all newly certified devices resist attacks.