WiFi (Wi-Fi ) is a slang term for 802.11 wireless internet.
Short for wireless fidelity and is meant to be used generically when referring of any type of 802.11network, whether 802.11b, 802.11a, dual-band, etc. The term is recommended and promoted by The Wi-Fi Alliance.
All products tested and certified as "Wi-Fi Certified" ® as interoperable with each other, even if they are from different manufacturers. A user with a "Wi-Fi Certified" product can use any brand of access point with any other brand of client hardware that also is certified. Typically, however, any Wi-Fi product using the same radio frequency (for example, 2.4GHz for 802.11b or 11g, 5GHz for 802.11a) will work with any other, even if not "Wi-Fi Certified."
Formerly, the term "Wi-Fi" was used only in place of the 2.4GHz 802.11b standard, in the same way that Ethernet is used in place of IEEE 802.3. The Alliance expanded the generic use of the term in an attempt to stop confusion about wireless LANinteroperability.
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