Tutorial Playlist

Cyber Security Tutorial: A Step-by-Step Guide


What is Cybersecurity?

Lesson - 1

Cyber Security for Beginners

Lesson - 2

How to Become a Cybersecurity Engineer?

Lesson - 3

What is Ethical Hacking?

Lesson - 4

What is Penetration Testing?: A Step-by-Step Guide

Lesson - 5

What Is SQL Injection: How to Prevent SQL Injection

Lesson - 6

How to Become an Ethical Hacker?

Lesson - 7

What Is a Firewall and Why Is It Vital?

Lesson - 8

The Complete Know-How on the

Lesson - 9

A Definitive Guide to Learn the SHA 256 Algorithm

Lesson - 10

What Is a Ransomware Attack and How Can You Prevent It?

Lesson - 11

A Look at the Top 5 Programming Languages for Hacking

Lesson - 12

The Most Informative Guide on What Is an IP Address?

Lesson - 13

The Best Ethical Hacking + Cybersecurity Books

Lesson - 14

10 Types of Cyber Attacks You Should Be Aware in 2022

Lesson - 15

The Top Computer Hacks of All Time

Lesson - 16

Top 6 Cyber Security Jobs in 2022

Lesson - 17

The Best Guide to The Top Cybersecurity Interview Questions

Lesson - 18

What Is a Brute Force Attack and How to Protect Our Data Against It?

Lesson - 19

The Top 8 Cybersecurity Skills You Must Have

Lesson - 20

Your Guide to Choose the Best Operating System Between Parrot OS vs. Kali Linux

Lesson - 21

All You Need to Know About Parrot Security OS

Lesson - 22

The Best and Easiest Way to Understand What Is a VPN

Lesson - 23

What Is NMap? A Comprehensive Tutorial for Network Mapping

Lesson - 24

What Is Google Dorking? Your Way to Becoming the Best Google Hacker

Lesson - 25

Your Best Guide to a Successful Cyber Security Career Path

Lesson - 26

The Value of Python in Ethical Hacking and a Password Cracking Tutorial

Lesson - 27

The Best Guide to Understand What Is TCP/IP Model?

Lesson - 28

What Are Keyloggers and Its Effect on Our Devices?

Lesson - 29

Best Guide to Understand the Importance of What Is Subnetting

Lesson - 30

Your Guide to What Is 5G and How It Works

Lesson - 31

How to Crack Passwords and Strengthen Your Credentials Against Brute-Force

Lesson - 32

A Look at ‘What Is Metasploitable’, a Hacker’s Playground Based on Ubuntu Virtual Machines

Lesson - 33

One-Stop Guide to Understanding What Is Distance Vector Routing?

Lesson - 34

Best Walkthrough for Understanding the Networking Commands

Lesson - 35

Best Guide to Understanding the Operation of Stop-and-Wait Protocol

Lesson - 36

The Best Guide to Understanding the Working and Importance of Go-Back-N ARQ Protocol

Lesson - 37

What Are Digital Signatures: A Thorough Guide Into Cryptographic Authentication

Lesson - 38

The Best Spotify Data Analysis Project You Need to Know

Lesson - 39

A One-Stop Solution Guide to Understand Data Structure and Algorithm Complexity

Lesson - 40

Your One-Stop Guide ‘On How Does the Internet Work?’

Lesson - 41

An Introduction to Circuit Switching and Packet Switching

Lesson - 42

One-Stop Guide to Understanding What Is Network Topology?

Lesson - 43

A Deep Dive Into Cross-Site Scripting and Its Significance

Lesson - 44

The Best Walkthrough on What Is DHCP and Its Working

Lesson - 45

A Complete Look at What a Proxy Is, Along With the Working of the Proxy Server

Lesson - 46

A Detailed Guide to Understanding What Identity and Access Management Is

Lesson - 47

The Best Guide to Understanding the Working and Effects of Sliding Window Protocol

Lesson - 48

The Best Guide That You’ll Ever Need to Understand Typescript and Express

Lesson - 49

Express REST API

Lesson - 50

All You Need to Know About Express JS Middleware

Lesson - 51

An Absolute Guide to Know Everything on Expressions in C

Lesson - 52

A Definitive Guide on How to Create a Strong Password

Lesson - 53

Ubuntu vs. Debian: A Look at Beginner Friendly Linux Distribution

Lesson - 54

Your One-Stop Guide to Learn Command Prompt Hacks

Lesson - 55

Best Walkthrough to Understand the Difference Between IPv4 and IPv6

Lesson - 56

What Is Kali NetHunter? A Deep Dive Into the Hackbox for Android

Lesson - 57

A Perfect Guide That Explains the Differences Between a Hub and a Switch

Lesson - 58

The Best Guide to Help You Understand What Is Network Security

Lesson - 59

What Is CIDR? And Its Importance in the Networking Domain

Lesson - 60
Your One-Stop Guide ‘On How Does the Internet Work?’

The advancement of technology requires continuous access to a significant size of data and information. This increase in data transmission needs a reliable and secure pathway, i.e., known as the internet. Internet is still under development but covers over all the major and most of the minor world locations for data exchange.

In this tutorial on 'how does the internet work,' you will look into the various features that work behind the internet and allow us to access data of any type from anywhere.

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What Is the Internet?


The internet as we know it is known as the connection of interconnected computers and network devices, either over small or large distances. The working of the internet is not as simple as we know it, as it connects various network models and devices to provide you with a secure and reliable connection for data exchange.

The videos and data that you access are transmitted over thousands of miles through the internet to your devices; these large-sized data and files are stored in Data Centers.

Connection Channels for Internet


The mode through which the internet is connected and shares data can be wired or wireless channels, the wired connection mode is done using fiber optic cables, which are specifically designed cables to connect over large distances and offer high-speed data transmission. These cables are connected under the oceans and reach the connection point on the mainland.

The wireless settings for the internet use satellites in space to provide data transmission, this technology is relatively new and used for pinpoint data transfer.

On the basis of communication distance, you can differentiate the internet connection into three primary types:

  1. LAN (Local Area Network) - In this connection, the distance covered is at most within a building, for example, a company sets up an internet connection for their employees in the company headquarters.
  2. MAN (Metropolitan Area Network) - This connection is an upgraded version of LAN, and covers the connection of a city at a minimum.
  3. WAN (Wide Area Network) - The network connection in this mode is not restricted to a single mainland but connects major landmarks such as connections between countries.

In the next section, you will know where the data shared over the internet is stored and how it is sent from that location to the devices.

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Storage and Sharing of Data


Now that you understand the transmission channels for data over the internet, it’s time to know from where you get your data. This storage task is performed at locations known as Data Centers, which are installed with multiple storage units, that act as a storage server, for the client device that requests the data.

When the data to send is decided by the server, the next step is to share it with the client device, and this task of sending and receiving data is done by applying a network concept known as the IP Address.

The IP address is a unique identification method, that allows your system to get access to various network devices and to transmit data and information along with the network, to the correct client system.

Now, move on to the next part in working of the internet, i.e, the naming system used in network models.

Naming Pattern in the Network


The naming structure of the internet is handled by the Domain Name Server (DNS). DNS assigns a domain name to an IP address and then stores it in a directory format for easy access in time of requirement.

The work of DNS is to provide assistance in case the user does not know the domain name to an IP address and then allows you to access the website directly using the IP address.


Through the parts of the internet mentioned above, you understood the work of each individual part in the functioning of the internet, now combine all the network attributes to design a simple working example of the internet.


In this image, you can see that the user is trying to access a website using its IP address, but the server requires the name assigned to this IP address for accessing the data required by the user, so it will use the DNS server to share the domain name of the requested website corresponding to the shared IP address.

After this step is completed, the server will send the request of required data to the data center and then share the result with the user.

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In this tutorial on ‘How Does the Internet Work?’, you looked into the ways the internet works from the very beginning to be able to use the internet to access an innumerable amount of information and data of any format from any location.

If you want to learn more about the topic and further enhance your knowledge about various aspects of working on the internet, you can refer to Simplilearn's Cyber Security Expert course. This expert course will equip you with more than enough knowledge for working on the internet.

Do you have any questions related to this tutorial on ‘How Does Internet Work?’ If yes, feel free to mention them in the comment section at the bottom of this page. Our team will help you solve your queries ASAP.

About the Author


Simplilearn is one of the world’s leading providers of online training for Digital Marketing, Cloud Computing, Project Management, Data Science, IT, Software Development, and many other emerging technologies.

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