Wi-fi or WiFI is a term for wireless computer networking technology that enables electronic devices to connect to a LAN (Local Area Network). Sometimes you can get free wifi at hotspots. Typically they will use radio bandwidth in the range of 2.4 gigahertz UHF and 5 gigahertz SHF ISM.
According to the WiFi Alliance, WiFi is defined as any “wireless local area network”(WLAN). WLAN is based on IEEE 802.11 standard. The terms WiFi and WLAN are synonymous in the English language for practical use. The term “Wi-Fi” itself is trademarked and can only be used by products that have successfully undergone testing and have been certified for use by the Wi-Fi Alliance.
Many devices can use WiFi including cameras, video game consoles, smartphones, tablets, appliances and more. These devices can be connected to a network like the internet through a wiredless network access point. This access point is known as a hotspot. Typical hotspot range is around 60 to 70 feet indoors and larger for outdoor hotspots.
Generally Wi-Fi can be less secure than connections wired by cables, mostly because the intruder will not have to find a physical connection. Unencrypted access is easy for intruders to detect. Due to this vulnerability WiFi has adopted multiple encryption technologies. WEP encryption is not nearly as as other protocols such as WPA, WPA2 and WPS.
In the early 1970s ALOHAnet was able to connect the islands of Hawaii with a UHF wireless packet network. The protocol used for ALOHAnet were innovative tools used to start the Ethernet.
In 1985 the US FCC released a the ISM band for use. These radio frequency bands are the same exact ones used in microwave ovens and are highly susceptible to interference.
By the 1990s NCR Corp and AT&T teamed up to create the precursor to the 802.11 protocols, for cashier systems to use. The first wave of wireless products for use by proprietors was named WaveLAN.
Flash forward to 1999 passed a few major developments and a secure updated version of 802.11b was put in use to permit 11 Mbit/s link speeds and became very popular. Today WiFi uses a large number of patents held by many different organizations.
The term Wi-Fi has been used for commercial applications as soon as August 1999. It was coined by a brand consulting firm called Interbrand Corporation. The Wi-Fi Alliance hired Intebrand to help coin a term that was more catchy than “IEEE 802.11b. Phil Belanger is a founding member of the Wi-Fi Alliance who helped determine the new name. The name is stated by members of Interbrand’s marketing team to be a play on words of Hi-Fi.
The Wi-Fi Alliance is used a nonsensical slogan “Standard for Wireless Fidelity” shortly after the brand name was coined. This lead to a widespread misconceptions that Wi-Fii was short for “Wireless Fidelity.” The Wi-Fi logo has a yin and yang quality to it in order to promote interoperability. The name is commonly printed as WiFi or Wifi. Neither of these are approved by the Wi-Fi Alliance.