What is Computer Network? Application of Computer Networks

A Computer Network is a combination of devices (computers and laptops) that are connected together for the purpose of data or resource sharing. The devices use general connection protocols beyond digital interconnections to connect with more devices.

A Computer Network is like a group of friends who can share their toys, games, and secrets easily and quickly. Imagine if you wanted to send your friend a letter or a drawing; a computer network helps you do that electronically, sending your message from your computer to your friend’s computer in no time. People use computer networks for many things like learning, playing games together, sending emails, watching videos, and even buying things from stores without leaving their homes.

Detailed Explanations

What is a Computer Network?

A Computer Network is a magical system that connects computers and devices together. It’s like a spider’s web that links many points, allowing computers to talk to each other. This network can be small, just in one house or school, or huge, covering the whole world like the Internet.

How Does it Work?

Imagine sending a letter in the mail. In a computer network, we send messages, pictures, and videos, but instead of using paper, everything turns into tiny bits of data that travel super fast across cables, through the air, or even space to reach another computer.

The sharing of data can occur through the two feasible ways

  1. Physical cable media, such as fiber-optical cable, twisted pair etc.
  2. Wireless methods such as Wi-Fi, radio communication, and microwave transmission. 

An example of a network is the tern LAPLINK, which allows you to copy files from one device to another device over a specific parallel port to be considered a computer network. Another example specified here is that we all may use it in our daily lives, i.e., the internet.

Some various types of networks are LAN, MAN, WAN etc.

Various types of networks that can be used for different functions

  • LAN: Local area networks are mainly used to connect personal devices within a few kilometers of a limited area. These networks are used in offices, companies, and factories to exchange data and Information. 
  • MAN: Metropolitan area networks are used to connect the devices over an entire city under the range of up to 50 km. These networks are used in the telephone company network and cable TV network. 
  • WAN: Wide Area Networks are used in the wide geological range over a country and continent. These networks are used in military services, mobile operators, railways, and airlines reservations. 
  • PAN: Personal area networks appropriate to personal or separate workspace under the range of 10 meters. These networks are mostly used to connect tablets, smartphones, and laptops. 
  • CAN: Campus area networks are used to connect limited geographic areas. CAN interconnect multiple local area networks (LAN) within Colleges, Universities, Corporates buildings, etc.  

Other networks are enterprise private networks, internet works backbone networks, home area networks, and global area networks. 

Applications of Computer Networks

1. Resource Sharing

Resource sharing is an application of a computer network. Resource sharing means you can share one Hardware and Software among multiple users. Hardware includes printers, Disks, Fax Machines, etc. Computing devices. And Software includes Atom, Oracle VM Virtual Box, Postman, Android Studio, etc.

2. Information Sharing

Using a Computer network, we can share Information over the network, and it provides Search capabilities such as WWW. Over the network, a single information can be shared among the many users over the internet.

3. Communication

Communication includes email, calls, message broadcast, electronic funds transfer system etc.

4. Entertainment Industry

In Entertainment industry also uses computer networks widely. Some of the Entertainment industries are Video on demand, Multi-person real-time simulation games, movie/TV programs, etc.

5. Access to Remote Databases

Computer networks allow us to access the Remote Database of the various applications by the end-users. Some applications are Reservation for Hotels, Airplane Booking, Home Banking, Automated Newspaper, Automated Library etc.

6. Home applications

There are many common uses of the computer network are as home applications. For example, you can consider user-to-user communication, access to remote instruction, electronic commerce, and entertainment. Another way is managing bank accounts, transferring money to some other banks, paying bills electronically. A computer network arranges a robust connection mechanism between users. 

7. Business applications

The result of business application here is resource sharing. And the purpose of resource sharing is that without moving to the physical location of the resource, all the data, plans, and tools can be shared to any network user. Most of the companies are doing business electronically with other companies and with other clients worldwide with the help of a computer network. 

8. Mobile users

 The rapidly growing sectors in computer applications are mobile devices like notebook computers and PDAs (personal digital assistants). Here mobile users/device means portable device. The computer network is widely used in new-age technology like smartwatches, wearable devices, tablets, online transactions, purchasing or selling products online, etc. 

9. Social media

Social media is also a great example of a computer network application. It helps people to share and receive any information related to political, ethical, and social issues. 

10. Learning and Education

Just like going to a library, but you can do it from your computer. You can find books, videos, and even talk to teachers and other students from anywhere in the world.

11. Communication

Sending emails or chatting on websites is like sending digital letters or talking on the phone. It’s fast and can reach anyone, anywhere, as long as they are connected to the network.

12. Entertainment

Watching movies, listening to music, or playing games with friends online. It’s like having a cinema, a concert, and a playground in your computer.

13. Working from Home

People can do their jobs from home, accessing their office computer or meeting with colleagues through video calls. It’s like an office, but your home is your new workspace.

14. Shopping

Buying things you need or want without going to a store. You can look at things from many shops, choose what you like, and have it delivered to your door.

15. Banking and Paying Bills

No more waiting in lines at the bank. You can look at your money, send some to friends or businesses, and pay for your bills, all from your computer.

Important Points with Examples

  • Internet: The biggest computer network is the Internet. It connects millions of smaller networks together, making it possible to access almost any information, communicate with anyone, and do lots of things online.
  • WiFi and Mobile Networks: These let us connect to the Internet without cables. WiFi is like a magic invisible cable that connects your computer to the Internet, and mobile networks let you do the same from almost anywhere, even if there’s no WiFi around.
  • Safety and Security: Just like locking your door at home, there are ways to keep your information safe on computer networks. Things like passwords and special codes make sure only you and people you trust can see your information.


Computer Networks are amazing tools that help us do so many things every day, from learning new things, talking to friends and family, having fun, to even shopping and banking. They make our world smaller and our possibilities bigger, connecting us to information, people, and services no matter where we are. Just like a spider’s web catches everything that comes into it, computer networks catch and share all sorts of information, making life easier and more fun.