Wi-Fi is WECA (Wireless Ethernet Compatibility Alliance) for the popularity of various IEEE802.11 standards and build a brand.
From the beginning of 2002 WECA renamed Wi-Fi Appliance, the organization provides interoperability testing IEEE802.11 products to the Wi-Fi equipment vendors and qualified products issued by the Wi-Fi Certified certification, therefore, with Wi-Fi flag wireless LAN device means that the product has been interoperability tested and certified.
And the sound of the word is similar to Hi-Fi, Wi-Fi refers to high-quality wireless LAN.
In our ordinary people mouth, Wi-Fi has almost become synonymous with a wireless network, but strictly speaking, it is only a small part of the overall network structure, in the family or the company of such a small local area network (LAN), a cable network through the network cable connection , the wireless data network through radio wave transmission:
Further, the wireless LAN radio waves may be subject to interference from other equipment, resulting in signal instability, such as microwaves, radio waves are emitted, a frequency similar to the frequency of the wireless LAN, it will interfere with the WiFi signals.
In addition to Wi-Fi supported wireless LAN, wireless network technology as well as Bluetooth short-range, the metropolitan area of WiMax, used in home appliances remote control ZigBee, as well as 3G, 4G and even 5G network we use outdoors (wireless WAN) .