How actually WIFI works?

Wifi stands for wireless fidelity, a popular technology used to connect to the internet without hardware cables. It also allows devices like laptop, Computer, mobile phones to exchange information. It can also be taken as a synonym of WLAN.

Wifi network is built with the help of several hardware components like wireless access points or routers and user devices. Wifi router is the main hub of wifi network. It is usually connected to a high speed modem. The modem is connected to an Internet Service Provider (ISP) from where it gets hardware signals. The modem sends hardware signals to wifi router and the router converts them into radio waves. The radio waves can be accessed through any wifi supported devices.

Wifi signals are transmitted into certain frequencies, either 2.4 Gigahertz or 5.0 Gigahertz. But other usual devices like walky-talkies, radios, car radios etc use frequencies in kilohertz and megahertz range.

Wifi is a network carrying instructions which tell the connected devices what to do in each pixel on the screen. The instructions are converted into codes which only need two different modes- On and OFF. For example, a code might be this-

-OFF-OFF-OFF-OFF-OFF-OFF=A

OR

-ON-OFF-OFF-OFF-OFF-OFF=B

OR

-ON-ON-ON-OFF-OFF-OFF=C

To transmit a picture, we’ll need huge amount of ON-OFF signals and for video, even more. Luckily for us, electro-magnetic radiations travel in the speed of light. So, even something really so complex can be transmitted super quickly.

The area where wifi access is available is called hotspot. Any digital device within the hotspot range can connect to the wifi network. The range is not possible to be defined accurately but a typical wifi network can cover a whole family apartment.   Business networks can cover a whole office building. Even there are examples of setting wifi covering several square miles in some cities. The network speed varies from device to device and depending on distance from router. Wireless range is possible to be effected by surroundings such as natural elements and obstacles. Physical obstacles like walls or concretes, water and even human beings can slow down wifi. Sometimes microwave ovens can create disturbance in the network because it also uses the frequency range of 2.4GHz.

There are several types of wifi network depending on the speed limits. The costs for the network also depend on the speed limit of wifi.