What is wifi?

Wifi, or “Wireless fifelity” , is a wireless network that uses radio waves much like a mobile phone or television to transfer informational data from one piece of equipment to another. A wifi network transfers data much like a two-way radio.

Wife I transmit data in a frequency of 2.4 GHz or 5 GHz. 5 GHz is a frequency much higher than used in mobile phones or two-way radios. The higher frequency allows a signal to carry more data. Wifi networks use a network standard called 802.11.

  • 802.1a transmits at 5 GHz and can transfer up to 54 Mb of data per second. Splits the radio signal to into many signals each passing information separately. Data is then merged by the receiver. The splitting the data reduces the possible interference.
  • 802.1b transmits at 2.4 GHz and can transfer up to 11 Mb of data per second. It is the slowest least expensive standard. It’s becoming less common as faster standards become less expensive.
  • 802.1g transmits at 2.4 GHz but it is a lot faster and can handle up to 54 Mb of data per second.
  • 802.1n its latest standard of wifi connections. It can transfer up 240 Mbps of data.

Wife I radio can transmit any of three frequency bands. This process known as frequency hopping allows a wifi network to reduce interference and allows multiple devices or computers to use the same wireless connection at the same time.