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What is Wi-Fi?, History, Working, & More - Learn Everything From Scratch

If you want to get pro knowledge about what is wi-fi? how does wi-fi work? History, Definition and much more than dig here to clear your all doubts.

Well, the short answer for "What is Wi-Fi?" is that Wi-Fi stands for Wireless-Fidelity, which provides high-speed internet and network connections without any physical wire (Wirelessly).


But wait! my article says that "What is Wi-Fi? - Learn Everything From Scratch". So let's dig into its infinite depth from the beginning- 'Birth of Wi-Fi.'

Hello, recall the days when your web/internet was associated through the telephone line? Ugh, the sound of dial-up still frequents me in my rest.

… Well, we've made considerable progress since at that point, and the chances are that you're reading this article through Wi-Fi at the present time.

So how did we arrive at any rate? Simply bounce into my time machine, and I'll show ya!

Where Does Wi-Fi come from? (History and Birth)

The underlying foundations of Wi-Fi go path back to 1940-

That is the point at which a famous Hollywood entertainer, what's more, an innovator by the name of 'Hedy Lamarr', came up with an approach to prevent radio signals from being altered.

That was quite a significant objective since, in those days, radio-controlled torpedoes could easily be intercepted and change their course, which meant an enormous fail for the Navy submarines.

Therefore, she thought of the great idea of frequency-hopping signals, where people who controlled them could hop from one frequency to the next and make those torpedoes practically resistant to radio interference.


Presently get your twofold sew jacket and how about we quick forward to the 1980s-

This was when PCs had started to enter our lives for good. Bt at that time, PCs were connected to the web(internet) through the infamous Ethernet wires/cables/links.

It appears to me like scientists were getting tired of stumbling over each one of those wires or cables since they wanted to begin sending information(data) utilizing radio signals.

But sadly, those early experiments were ineffective since everything bounced back on walls, furniture, and essentially anything that remained in a PC's way.

What scientists didn't know at the time was that the issue had been solved 10 years before PCs were even invented!

Everything began, harking back to the 1970s-

with electrical engineer Dr. John O'Sullivan, a.k.a. "the father of Wi-Fi." At the time, he and his group were attempting to recognize radio signals from far off dark openings(black holes) in space, and they came up with complex equations called Fast Fourier Transforms.

Sadly, they proved unable to detect those black holes, and they put all their gear back on the racks to sit also, gather dust.

Surprisingly, after twenty years, Dr. O'Sullivan furthermore, his associates chose to give wireless networking a chance, and those forgotten complex equations would play a key job in the invention of Wi-Fi.

After a great deal of experimentation, they took their fancy Fast Fourier transforms, included them in the blend with the data equations they'd previously attempted to send over the radio.

And in this way, they shaped the basis for the Wi-Fi we all know and use today!

But, again, that was only the basis of Wi-Fi.

Afterward, in 1996, they further developed their original key patent, and by 1997 they, at last, broke the code and came up with the first version of the 802.11 protocol.

Gracious, well, perhaps you didn't get what I was stating among all that numeric jibber jabber.

What is Wi-Fi exactly?

Alright, so how about we talk about the name you're more familiar with: Wi-Fi. What does it mean anyway?


Wi-Fi is short for Wireless-Fidelity, but wait......, how? And why? just follow my words below to know the answers-

Here's the secret the naming circumstance went down-

Since their first protocol, the Wi-Fi Alliance wanted to concoct a catchier name than 802.11 protocol (smart thought!), so they contracted some market-astute persons to assist them with that.

"Wi-Fi" was born! Wi-fi is a pun for the word Hi-Fi, which signifies "High-Fidelity."

– a technical term used for high-quality sound technology. Let's envision walking into a cafe and asking the staff for the secret key to the "IEEE 802.11"!

Also, Read- 

1. What is Windows?
2. What are CUDA Cores?

How does Wi-Fi work?

How Wi-Fi work is a little broad topic. Anywho, since we've secured all these decades and how we got where we are today, we should investigate how Wi-Fi truly functions.

And I will explain it in the simplest way by touching some daily life examples. Just follow my words-

You definitely know that wireless internet helps you send and get files,
pictures, messages, and so forth, yet did you know that this is all through radio waves? (Hello, remember about Hedy Lamarr and Dr. O'Sullivan – I disclosed to all of you that stuff for an explanation!)

Yes, Wi-Fi uses radio waves to transmit information/data between your switch(ROUTER-which is your Wi-Fi source) and your gadget (or the "Collector” OR Receiver).

These frequencies are measured in Gigahertz. To put all the sciencey stuff behind that in laymen's terms,

envision this:-

You're sitting on the beach and enjoying the sun and watching the waves crash with the shore.

If you somehow happened to calculate the time between each wave-crash, you'd be calculating the frequency of the wave.

Let's assume that the time it takes for each wave to hit the shore is one second, that second is calculated by hertz, as such, 1 Hertz = 1 second. Presently, 1 Gigahertz is equal to 1 BILLION waves per second.

If you could see that many sea waves moving so quick, at that point, you may wanna hurry outta there and head for the hills!

So, the frequencies Wi-Fi routers use are 2.4 or 5 Gigahertz per second, which is the reason information(or data) gets moved so rapidly to your Smartphone or Computer.

With regards to speed, the 5 Gigahertz frequency sends data quicker over shorter separations, while the 2.4 Gigahertz router covers more distance however goes slower.

You also keep in mind the interference from different gadgets in our homes that also utilize the 2.4 Gigahertz radio frequencies.

For example, if you have baby monitors, garage doors, microwaves, cordless phones, and remote cameras, they can interfere with your Wi-Fi. What's more, this kind of interference can diminish the speed, or you may lose your internet connection altogether!

Oh goodness! Hold off before you microwave some popcorn while gorging on my website!

Although, the latter 5 Gigahertz wireless frequency has 23 channels accessible to send all your data. Thus it doesn't let any of those home gadgets cause network issues.

When you turn your telephone or PC on and jump on the internet, all the information/data you would like to get to is separated into binary code.

You've probably known about this PC language made up of 0s and 1s.

And when you access through Wi-Fi, at that point, that binary code is changed into wave frequencies.


In case you're attempting to envision how this procedure works exactly, consider it this way. Envision you're just trying to send a picture you took on your birthday to your closest Friend for fun.

When you hit "send," the photograph is separated into littler pixels or Parcels or packets and travels around various routers until it arrives at your Friend.

These Parcels or packets are immediately reassembled like a riddle, and your Friend can finally see the photograph (and laugh accordingly).

All that happens with pretty much anything you try to send, be it recordings, videos, even voices or Animations/Graphics.

In this way, Wi-Fi works, and we can send any information through it.

Is Wi-Fi Dangerous or Harmful to our Health?

Do you ever think about what it'd resemble if we could see all these radio frequencies swirling around the room? I imagine myself sitting comfortably on the bed watching cat videos.

– I mean, completing some work, obviously!

– and suddenly, all these waves become visible, and I can see everything.

 I see the little parcels/bundles of information going from my switch(router) to my Smartphone, each one of those pixels and vivid frequencies floating through the air.

Everything would be going around me like a long exposure photograph in slow motion, kinda like a little rainbow storm right in my living room!

Now, I know what you're thinking. (OK, maybe I don't, but I can take a guess.) In case we're really surrounded by all these radio waves, what does it do to our Body and Health? Is Wi-Fi harmful or any kind of Dangerous For Our Health?

Well, the short answer is No.


Wi-Fi works at very low voltages. Even at short separations, Wi-Fi is simply part of the household "smog" that is generated by television and radio signals.

Wi-Fi uses non-ionizing wavelengths of radiation that are not harmful to the human body.

The sun, on the other hand, uses ionizing radiation wavelengths (or Ultraviolet rays) that aren't so good for human skins. It is more harmful to your body to go outside than it is if you simply sit next to your Wi-Fi router.

Think I'll keep myself planted on the bed then! and to relax your mind more,
according to the World Health Organisation(WHO), there is no experimental proof to confirm that exposure to low levels of electromagnetic fields has any negative effects on our wellbeing(Health).

Why Do Signals lose at Certain Places?

Alright, Now lets we talk about why your Wi-Fi signal drops in some spots around your home.


Wi-Fi works just like light or sound. The further you are away from the router or Wi-Fi Device, the fewer signals you get.

An ordinary Wi-Fi Router works at around 100 feet in every direction.

Concerning what can temper it, that is anything that needed electric power, like metal, water, mirrors, and even our bodies since they chiefly comprise of water.

For example, If you stand/sit between your Wi-Fi Router and your Gadget(Maybe a Smartphone or a PC), you may see a signal drop sometimes.

Even thick brick balls and concrete(cement) can interfere with the signal – you just probably won't take notice of the difference since it's tiny, another highly technical scientific measurement. Just littler than a "tad."

And there ya have it, folks! Now you know somewhat more about the Wi-Fi you spend a long time on every day, maybe you'll value it substantially more!

 …Especially if you were during the dark days of dial-up – regardless, I feel extremely lucky each time I jump online inside a small amount of a second!

Anyway, would you say you are as dependent on Wi-Fi as I am?

Tell me down in the comment box! If you learned something new today about What is Wi-Fi?.

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By Satya Gupta


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