What is Wifi? How does it Work?

Most of you must be using Wifi. Today, we are going to tell you about what is Wifi and how does it work.

Wifi is a wireless technology used to connect computers, smartphones, tablets and other devices to the Internet. It sends the radio signal from the router to the device, which converts the signal into visual-readable and viewable data.


Those who know about it and want to use it, they also know how to get WiFi installed? Apart from this, they will also know what is its full form and how it works.

If you do not know how far the Internet had to travel through cable to reach wireless, then in this post I will tell you.

Have you ever tried to know before when there were no mobile networks and people used to talk to each other only through telephone, how people used to run the internet at that time.

So let me tell you that at that time the internet connection was taken through cable and dial was also done to connect the internet, it used to take a lot of time.

In the olden days, it was not possible for everyone to use the Internet. People were unaware of what is wifi and how it is used. People had to go to internet cafes but today the internet has reached everyone's hands.

It also works very fast and does not require any cable.

We use Wi-Fi to access the Internet in our laptop, so what is this WiFi after all (What is WiFi) we will know further.

If this was not the case, then imagine that even today we run by connecting cables in our laptops and computers, through this post we will also know what is its history.

What is WiFi ?

We also call WiFi by this name as Wi-Fi. This is a local area wireless technology.

This is a technology in which Wi-Fi helps to transfer data from electronic devices and connect to the Internet using ISM radio bands.

This technology comes under the local area network, which means that its range is only up to a small area.

WiFi helps computers and other devices to communicate with the help of wireless networks.

Through this technology, we are able to connect mobile smartphone, tab, desktop with wifi dongle and laptop to the Internet in a limited area.

In this way we do not need any internet broadband nor internet connection with any cable connectivity.

 Full form of Wifi

WiFi Alliance as a trademark has given it a name which we often know as Wi-Fi full form Wireless Fidelity.

Have you ever used this service?

Your answer would be yes

Whenever your mobile data gets exhausted, you will still be telling your friend to get it, brother, give the data for a while.

So at that time your friend would have hotspot ON in his phone and you would have made internet connection by doing WiFi ON in your mobile phone. Now you answer my question.

Has the facility of WiFi proved to be very beneficial for you or not?

Your answer will also be that yes it is a very useful technology. Because there is no need for modem and cable internet to run internet even in laptop and desktop.

WiFi is used in many devices like PC, video game console, smartphones etc.

To use WiFi, we also create a hotspot ourselves, which has a range of 20 meters (66 feet). The components of WiFi are based on 802.11 standards developed by IEEE.

It provides a standard way to connect to a wireless network. Let us know what are the other standards used in this.

WiFi standards in chronological order

• 802.11a

• 802.11b

• 802.11g

• 802.11n

• 802.11ac

If there is a wireless access point 802.11b or 802.11g, then their range is 120 feet indoor ie indoors and 300 feet in outdoor open space.

You may not have noticed, but our smartphones, printers and laptops have a wifi chip.

Through this, our device connects to the wireless router and allows us to run the Internet. Today, we use the Internet through wireless networks everywhere, whether we are sitting or roaming outside.

But how it works is also an important question, so let us also know that how does this Wi-Fi work?

How does WiFi work?

If you ever go to the airport, coffee shop, railway station, then you are definitely inside the wifi zone at that time.

There are many such cities where the government has created a wifi zone where people can go and use the internet for free, but have we tried to know how this technology works.

Any wireless network uses radio waves as mobile, television and radio do. Understand that whenever there is wireless communication, it is always two-way radio communication.

Now let's see how this happens:

1. The wireless adapter of our laptop converts the data into radio waves and transmits it using an antenna.

2. Wireless router receives the signal and decodes it. Router sends information to the Internet through a physical wired ethernet connection.

The same process also works in reverse, in which the router receives information from the internet.

It then converts it into a radio signal and sends it to the laptop's wireless adapter. In its network, radio waves work in the same way as radio waves work in walki-talkie and cell phones.

The Wifi chip of our mobile and other devices can transmit and receive radio waves. And this chip can convert radio waves into 1 and 0, then convert 1 and 0 back into radio waves as well.

Friends, by now you must have understood that what is its working process, let me now explain it with a practical example.

When I had taken a broadband connection, I was given a cable which I used to use as a LAN cable in my laptop.

But then I put my D-Link in the router and now the wifi network has been created inside my room, in this way now I am able to access the internet without wires and cables in any part of the room or sitting outside the room.

So, here you have seen that to create a wireless network from the router, an ethernet cable was needed which gives connectivity to the Internet, while the router gives us a wifi zone in the form of a wireless network for us.

If we talk about it in simple language, then suppose when you turn on the hotspot of your mobile, an adapter is installed inside your mobile, it converts the data into radio waves and makes it a wifi zone.

In a way, it becomes a WLAN (Wireless Local Area Network), in which any mobile, computer, laptop coming inside can connect to it.

Its radio signal is not strong, so its signal goes only for a short distance (15-20 meters).

Now when you connect your laptop or other device to this wifi network, it establishes internet connection with that device.

In this way, the device we have made a hotspot is also connected to the Internet and works like a router.

By which the data of all the connected devices keeps changing and transmitting the information into radio waves and then also converts the radio waves into data.

That is, it works as both a router and a transmitter. Now you must have got the idea how wifi works.

Nowadays, almost every device like mobile, tablet, Ipad, laptop has inbuilt wifi adapter so that you can easily access the internet.

But desktop computers do not have an inbuilt adapter, but we can use them separately by installing an adapter through a USB port.

History of Wi-Fi


Although Wi Fi was started for the general public in 1985, but its foundation was laid 14 years ago.

It started when the University of Hawaii first presented a demo of ALOHAnet, a wireless packet data network, in 1971, which was based on UHF (Ultra High Frequency) radio waves.

Then in 1985, America's Federal Communications Commission (FCC) announced that anyone can use wireless spectrum for communication without a government license.

The frequencies released in this were 900MHz, 2.4 GHz and 5.8 GHz. In 1985 itself, IBM introduced the TOKEN Ring LAN, which had a speed of 4 Mbps.

CR and AT&T Corporation together proposed the introduction of WaveLAN, which would replace Ethernet and Token Ring systems.

It worked at 900MHz or 2.4 GHz and its speed was 1 to 2 Mbps.

After this, in 1989, the WaveLAN design was submitted to the Institute of Electrical and Electronics Engineers 802 standards committee.

Father of WiFi

In 1990, the IEEE 802.11 wireless LAN working group was created, headed by Vic Hayes and also known as the Father of WiFi.

In the conference being held in San Francisco, Henrik Sjodin made a proposal according to which the creation of such a public access local area network that the common man can use.

Although its name was not thought at that time, but today we know it as "Hotspot".

AT&T completed the largescale installation of its WaveLAN project at Carnegie Mellon University. This was the first step to test this system, which was completed in 1993.

Carnegie Mellon University's Dr. Alex Hills initiated wireless research and aimed to cover 7 buildings on the campus.

The name of this project was Wireless Andrew and the National Science Foundation invested money on it.

After this the first version of 802.11 protocol was released in 1997 and it had the capability of 2 Mbps speed.

Only a year after this, a new revolution started in its world, the foundation of which had already been laid but the beginning started from here.

Mark Goode and Greg Jackson's company MOBILESTAR, which was a wireless internet service provider company.

This was the first company that named the term "Hotspot" and also started its service.

Mobilestar became the first company in the world to provide Internet access through hotspots in airports, hotels and coffee shops, and also signed contracts with American Airlines, Hilton hotels, and Starbucks.

WiFi Alliance was formed in 1999 which was a nonprofitable trade association.

It took the responsibility of the Wifi trademark to give the user experience and started the work of verifying all the products as well. In the same year, Apple introduced WiFi slots in its iBooks which was named "Airport".

After this, the 802.11b standard was approved, which had a frequency of 2.4 GHz and a speed of 11 Mbps.

A month later, the 802.11 A standard was also approved. Its speed was very high. This was a speed of 54 Mbps in the 5 GHz frequency. After that

• 1999 – 802.11b

• 2000 – 802.11a

• 2003 - 802.11g

• 2004 – 802.11i

• 2005 – 802.11e

• 2009 - 802.11n

• 2009 – 802.16 WiMax Protocol

After this, in 2010 the number of WiFi hotspots had reached 1Million all over the world, then President Barack Obama signed a memorandum to make the 500 MHz frequency free for the wireless industry.

2014 – 802.1ac standard was approved, which had an amazing speed of 1733 Mbps and 5 GHz frequency was used for this.

In 2015, the number of WiFi hotspots in the world increased to 70 million. So friends, now you know how old is the history of wireless network and it has reached us after a long journey.

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Best Features of WiFi

Everyone wants that its speed should be fast and safe, apart from this it is important to have good features.

So let's know what are those features that must be in your WiFi.

High Capacity Load Balancing

Initially, the wireless network was built keeping only the coverage in mind.

But come such a time has come when everyone has many devices and they use many devices simultaneously for internet connectivity.

That is why in today's time it is very important to have the ability to balance the load capacity. So that according to our wish, we can use many devices with good speed.

Indoor and Outdoor Coverage Option

By the way, you would think that it should be used only inside the room or house.

But when you see outside now that its zone remains in the railway station, airport, bus station too. If you ever go to get a router, then also keep in mind that we have the capability of outdoor coverage in this.


The popularity of new wireless devices always increases. Your wireless system should have this capacity, you can make it work according to your need, both small and large scale, ie increasing the capacity and coverage according to the need.


Have you ever used wifi of railway station? If you have used it, then you will definitely know how the speed is.

When you do internet in mobile, its speed is work compared to wifi.

When we use a wireless network to download a movie, it downloads very quickly as compared to mobile.

The same if we talk about live streaming, then it takes time to load the video in mobile internet but in wifi the video plays with good quality without buffering.

Mobile Device Management

Now once you think about how many mobiles you will be accessing in your wireless network.

Now when so many mobile devices connect to a network, thousands of applications will also be run in it.

Now how will you manage all these in it when one device comes then another device will come and connect.

With the help of Mobile Device Management, you can control all these applications as per your wish.

You can remotely remove that device from this network which device has been lost or stolen.


Have you ever noticed that when you use mobile in normal life and when you use it while traveling in train, then the time of your mobile battery drains quickly.

Yes, actually when we are in travel, the network keeps on changing again and again.

Because of this, the battery gets exhausted very quickly. On the other hand, if we talk about this service, then they use radio waves.

Due to which the battery of the mobile does not drain quickly.


Friends, when we use the Internet of a network in mobile, then a limitation is given in it that you can use only this much data.

If you use it, then there is also an unlimited plan in it and the speed is also constant.

There will be no limitation for you to use data. You can download as much as you want.

If you calculate the data as well, then you will find it very cheap as compared to the mobile plan.

Advantages of WiFi

1. It is very easy to add and remove clients in its network made of Access Points.

2. Its installation is easy and happens very quickly. It is not necessary to have technical knowledge for this.

3. To access its network, the other device only needs a password. That is why there is no need to do much for connectivity in it.

4. WiFi enable USB Dongle is available in the market at a very affordable price. And you can buy USB dongle of TP-Link, D-Link and Tenda at very cheap price.

5. The latest standards are version 11n and 11ac which deliver data in very fast speed whose speed is 300Mbps and above.

6. It is very easy to integrate its function in mobile devices. Millions of people use smartphones today, in which the facility of wifi is given inbuilt.

Disadvantages of WiFi

1. When the number of devices in the same network increases, the data transfer rate works.

2. Due to this system being wireless, it is very difficult to give full security in it. For this proper security authentication protocols and configuration are required.

3. In the range with access point and good signal strength, such devices work with full functionality. The best range to access WiFi is from 30 to 100. Its strength decreases when it goes out of it.

4. If ever this service does not work then there is a need to troubleshoot it. For this it is necessary to have basic knowledge of the device.

How to set up wifi?

If you want to use this service, then you have to first find out which networks are available in your area which are providing this service.

Tikona, Spectranet, ACT Broadband, Airtel Broadband Service If any of these services are available in your area, contact them and inquire about their plans.

Apart from this, BSNL is available in every part of India and very soon Jio Fiber will also reach your home. If Tikona is available in your area then take its service as they offer very cheap and good plans.

Choose any of these services and choose the plan. After this, you will need a router to create a WiFi network in your home.

In this, you connect the Ethernet cable to the broadband network and access the router and set the user ID password. In this way your WiFi network will be ready.


What is the range of WiFi?

In general, the router of this network, traditionally 2.4 GHz band, has a range of 150 feet i.e. 46 meters indoors.

If we talk about outdoor, then its range is 300 feet i.e. 92 meters. In comparison, the older routers that used 802.11a had a band of 5 GHz and its range was 3 times less than this.

In short

Just think once and see that even in today's time there was no Wi-Fi, then how would we do the internet which we use in computers, laptops and mobiles?

Since its arrival, you can use the internet anywhere by taking a laptop in your hand.

Even when the data in the mobile is exhausted, the internet of a friend is also used with its help.

Today you know what is WiFi and how to get WiFi installed. Apart from this, you have also come to know that what is its full form, and how it works.

We do use it sometimes even if it is from our friend's mobile phone or railway station network.

Its history is very old and we also talked about it in this post, what is its history and how did it reach us.

We already know its many advantages, but we have also learned some of its disadvantages here.

So friends, today you knew what is wi fi and how it is used.