Tutorial Playlist

Cyber Security Tutorial: A Step-by-Step Guide

Overview

What is Cyber Security and Why It is Important?

Lesson - 1

Cyber Security for Beginners

Lesson - 2

How to Become a Cyber Security Engineer?

Lesson - 3

What is Ethical Hacking and Type of Ethical Hackers

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 MD5 Algorithm

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 2021

Lesson - 15

The Top Computer Hacks of All Time

Lesson - 16

Top 6 Cyber Security Jobs in 2021

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 5 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
Best Guide to Understand the Importance of What Is Subnetting

With the advancement of technology and to meet the demand for the increase in IP addresses in the IT industry as well as to satisfy the personal requirement. To overcome this situation of assigning IP addresses to each device in a network, the concept of subnetting was introduced. 

The process of dividing IP addresses into smaller subunits that can later be assigned to multiple network devices in a network is referred to as subnetting. In this tutorial titled ‘what is subnetting?’, you will learn about various parts of subnetting in a comprehensive manner.

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What Is Subnetting?

What_Is_Subnetting

The need for applying the concept of subnetting is to provide an alternate way to prevent the wastage of IP addresses. Then dividing an IP address into multiple smaller units that can work as a separate network unit known as subnet, in the host network is known as the subnetting process. Subnetting allows the network to avoid frequent traffic problems that occur in the channel, resulting in smooth transmission of information in the network.

The smaller network units, also known as subnets, can be individually configured according to the user's requirements. As you further go into the tutorial on ‘what is subnetting?’, you will see the need to use the subnetting process.

Why Apply Subnetting?

Why_Apply_Subnetting

Every company requires an efficient way of designing their network channel for smooth and error-free data transmission over the network channel.

To overcome this problem of excessive use of network IDs, the concept of subnetting is applied in the system. To understand this, take a look at some of the reasons for using subnetting:

  • Sub-network: The most basic reason to apply subnetting is that it efficiently distributes an IP address into smaller subunits, according to the need of the network.
  • Increased Security: Subnetting makes it easier in establishing security units over the network channel to avoid data breaches.
  • Helps to prevent wastage of IP addresses.
  • Allows better communication between each subnetwork in the channel.

Next, in the ‘what is subnetting?’ tutorial, you will look into the work process of the subnetting concept.

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Working of Subnetting

The process of subnetting involves breaking down an IP address into smaller units that can be assigned to individual network units within the original network. This is done by using various techniques. 

Working_of_Subnetting

Subnetting divides an IP address into two parts, namely network address and host address.

Then, using the subnet mask technique, you can further divide the divided address into units and assign them to various devices in a network. Taking the example of an IP address with /24 subnet mask can be divided into two sub-networks of /25.

In the next part of the tutorial ‘what is subnetting?’ you will understand the important characteristics of subnetting.

Characteristics of Subnetting

To design a subnetwork, some features are required to be understood properly which are:

  • Network ID: It is the first IP address in each Sub-Network in the main network ID. 
  • Broadcast ID: This feature represents the last IP address in each Sub-Network in the network ID. 
  • First Host ID: The next IP address after the Network ID is represented by the First Host ID.
  • Last Host ID: The IP address right before the Broadcast ID is represented as Last Host ID.
  • Next Network: This feature assigns the Network ID for the next sub-network. 
  • # IP Addresses: This feature represents the total number of IP addresses in the sub-network.

To better understand the above characteristics, you can refer to this example,

Characteristics_of_Subnetting

In this tutorial on what is subnetting?’ you looked into the need of applying subnetting and its working process in the network. Then in the next section, you will look into some drawbacks of applying concept subnetting.

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Drawbacks of Subnetting

Drawbacks_Of_Subnetting

Using subnetting to design your network channel does not always prove to be efficient; in some cases, it may affect the overall communication channel of the network, so you should always remember the below-mentioned points when applying subnetting in the network:

  • Complex Connections: With the increase in the no. of sub-networks, the complexity of the network also increases several-fold. This makes maintaining and troubleshooting the errors in the network.
  • Unused IP address: This problem arises as the sub-network is needed with sufficient IP addresses, but due to class addressing, many addresses remain unused.
  • Hardware Requirement: The communication between sub-network is efficient only with the involvement of proper hardware devices (router, switch, etc.), which are needed to share continuous data exchange.
Upon completing this cyber security for beginners tutorial, build your network security skill-set with the Ethical Hacking Certification Training. Enroll today!

Conclusion

In this tutorial on ‘what is subnetting?’, you understood that through the subnetting concept, you could efficiently divide an IP address into smaller units, known as sub-networks. These sub-networks are interconnected through the subnet, which provides efficient network connectivity and increases the security level against cyber attacks.

To further understand this topic of subnetting, along with the other important network concepts, you can refer to Simplilearn’s Cyber Security Expert course. This will make you adept at using network concepts and their numerous applications in cyber security, hacking, and other related posts.

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

About the Author

Kartik MenonKartik Menon

Kartik is an experienced content strategist and an accomplished technology marketing specialist passionate about designing engaging user experiences with integrated marketing and communication solutions.

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