Wi-Fi Meaning and History
Wi-Fi Meaning and History
Wi-Fi Meaning and History
We have become accustomed to seeing or hearing the term Wi-Fi. But do we know what it really means or how wireless connectivity came about? Wi-Fi could be said to be short for Wireless Fidelity. First there was high fidelity, from the 1930s, then Hi-Fi, a term used in the 1950s. Now we have Wi-Fi.
Wi-Fi is now a trademark of the Wi-Fi Alliance. This Alliance, a non-profit organization, was formed in 1999 by several leaders of the global world. The goal was to adopt a single worldwide standard for high-speed wireless local area networking. By March of 2000 a Wi-Fi Certified program was launched.
Today, Wi-Fi has become quite universal. One in ten people use Wi-Fi at home, work or in countless other ways. Wi-Fi- is estimated to be used by over 700 million people and within 750,000 hotspots, around the world. There are about 800 million new Wi-Fi devices produced every year.
In terms referring to wireless we also have seen IEEE 802.11. This term is often used interchangeably with Wi-Fi.
Devices are often submitted to the Wi-Fi Alliance for certification but lack of certification does not imply the device is incompatible with Wi-Fi devices or protocols. The Wi-Fi Alliance also does not object to items that are partly compatible or compliant be described as a Wi-Fi device, but that device cannot carry the Alliance's stamp of approval.
Today, numerous electronic devices have become Wi-Fi compliant. They include personal computers, video games consoles, MP3 players, smartphones, printers, peripherals, and laptops.
So how does wireless or Wi-Fi work exactly? Wireless networks use radio waves, just like a cell phone, television or radio would. Communication between wireless networks is considered to be like a two-way radio communication. First, a computer's wireless adapter translates data into a radio signal which is then transmitted using an antenna. The wireless router will receive this signal and decode it. The router in turn, sends the information to the Internet using an Ethernet connection. Conversely, with the router receiving information from the Internet, it translates this into a radio signal and sends it to the computers wireless adapter.
A radio used for Wi-Fi is thus, very similar to the radio used for walkie-talkies. The radio waves are converted into 1s and 0s with radio waves and these are converted back into 1s and 0s. So what is the difference between a Wi-Fi transmission and a radio transmission?
Transmission frequencies are of 2.4 GHz or 5 GHz. This frequency is considerably higher than the frequencies used for cell phones, walkie-talkies and televisions. The higher frequency allows the signal to carry more data. Wi-Fi also uses 802.11 networking standards. These standards come in different forms, 802.11a, 802.11b, 802.11g, and 802.11n. The 802.11n is the newest standard and has improved speed and range.
Wi-Fi systems can also transmit on any of three frequency bands they hop around between the different bands.
Today, companies and researchers are developing new "no new wires" technologies to provide alternatives to Wi-Fi for applications in which Wi-Fi's indoor range is not adequate.
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