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

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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

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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

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What Is CIDR? And Its Importance in the Networking Domain

Lesson - 60
The Best Guide to Help You Understand What Is Network Security

Being witnesses to the daily cybercrime stories and living in the digital era, we all understand how important it is to safeguard our data. 

As we know, organizations today work on large amounts of digital data and are more digitally advanced than ever. It is, therefore, all the more crucial to keep a check on organizations’ security postures, and network security plays a vital role in this aspect. In this article, we will understand what is network security and its fundamentals. 

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What Is Network Security?

Have you ever wondered how safe our digital data is? With the increase in the number of global internet users today, the security of our networks is at considerable risk. To tackle this problem, we have network security.

Before understanding what is network security, it is imperative to understand what a network is. A network is a group of interconnected devices; servers, workstations, laptops, etc., interconnected with each other. A network is primarily used for data transmissions and communication. The practice of safeguarding and preventing the underlying networking infrastructure against illegal access, alteration, or destruction is known as network security.

Network security enables us to safeguard the integrity of our information and network. It prevents a network from unauthorized access and applies to every type of computer. Network security incorporates hardware and software technologies to provide a secure platform for all the network devices connected and for the users. In most cases, network administrators carry out the duty to protect their networks from potential cyber security threats.

Considering the current virtual world we live in, cyberattacks are on the rise. Hence, implementing network security to gain a secure digital environment is of paramount importance. Being the foundation of cyber security, network security plays a vital role in safeguarding our data. 

Now that you know what is network security, let’s understand the two essential types of network attacks.

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Types of Network Security Attacks

A process used to attempt to compromise network security maliciously is defined as a network attack. There are two types of network attacks; active attacks and passive attacks. Let us have a look at both these network attacks. 

Active Attacks

In an active attack, the intruder attempts to disrupt the network’s normalcy, modifies the information, and tries to alter the system resources. 

As shown below, a sender, receiver, and attacker is a man in the middle trying to create an active attack. When the sender sends data to the receiver, the attacker intercepts that data, modifies the data, and then sends the modified data to the receiver. While doing so, neither the receiver nor the sender would be aware of the attacker, and thus they would not be aware of the modification that has been done.


Fig: Active Attack

Passive Attacks

In a passive attack, the intruder intercepts data that travels through the network. Here, the intruder eavesdrops but does not alter the message. 

As shown in the diagram below, the attacker captures the data packets and copies the contents to use them later. 


Fig: Passive Attack

Now that you have understood the types of network attacks, let us move to the next part of this article and look at the different types of network security. 

Types of Network Security

Network security typically includes three different controls: physical, technical, and administrative. Let’s dive deep into each of these types:

  • Physical Network Security: Unauthorized workers cannot get physical access to network components such as routers, cabling closets, and so on because of physical security restrictions.
  • Administrative Network Security: Security rules and processes that regulate user behavior, such as how users are verified, their degree of access, and how IT staff members execute changes to the infrastructure, are referred to as administrative security controls.
  • Technical Network Security: Data stored on the network or in transit across the network is protected by technical security mechanisms. It is necessary to secure data and systems from unauthorized persons as well as harmful acts by workers.

Now that you know what is network security and its types, let us go through the means by which you can secure your network.

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Network Security Methods

All the network security system components work together to improve an organization’s security posture. Listed below are a few standard network security components.

  • Access Control: You should be able to prevent unauthorized users and devices from entering your network to keep out possible attackers. Users having network access should only access the resources for which they have been granted access.
  • Application Security: The hardware, software, and processes that may be utilized to track and lockdown application vulnerabilities that attackers can employ to enter your network are referred to as application security.
  • Firewalls: A firewall is a hardware or software responsible for blocking incoming or outgoing traffic from the internet to your computer. Firewalls are required for a secure network.
  • Virtual Private Networks(VPN): Virtual Private Network (VPN) connects a VPN server and a VPN client. It is a secure tunnel-like connection across the internet.
  • Intrusion Detection System (IDS):  An IDS is designed to detect unauthorized access to a system. It is used together with a firewall and a router.
  • Honeypots: Honeypots are computer systems that are used to lure attackers. It is used to deceive attackers and defend the entire network from any attack.

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Are You Ready to Become a Network Security Professional?

So, how can we ensure network security? The best and simplest way of ensuring network security is by ensuring our passwords are complex everywhere. Simplilearn offers a "Cybersecurity Expert" course that focuses on such cybersecurity techniques and how to protect yourself from cyber attacks. The course is recommended for people looking to join the cybersecurity industry, as it covers basic and advanced modules that cater to beginners and professionals alike.

In today’s article on what is network security, we learned about the importance of network security and ways to prevent cyber attacks. We also saw the different types of network security. 

If you have any queries regarding this topic, feel free to ask them in the comment section below, and we will be happy to answer them.

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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