What is Distributed Denial of Service (DDoS)?

What is Distributed Denial of Service (DDoS)?
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Table Of Content

  • Introduction

  • How DDoS Works

  • Types of DDoS Attacks

  • Effects of DDoS Attacks

  • Protecting Against DDoS Attacks

  • Conclusion


Distributed Denial of Service (DDoS) is a type of cyber-attack that aims to make a website or online service unavailable to users. The attack is launched from multiple sources, hence the term “distributed”. This makes DDoS attacks particularly difficult to defend against as the attack traffic is coming from multiple sources, making it harder to identify and block.

How DDoS Works

A DDoS attack works by overwhelming a website or online service with a high volume of traffic. This traffic is generated from a large number of sources, making it difficult to identify the attack and respond to it. The goal of the attacker is to cause the website or online service to become unavailable to users.

Types of DDoS Attacks

There are three main types of DDoS attacks: volumetric attacks, protocol attacks, and application layer attacks.

  1. Volumetric Attacks

Volumetric attacks are the most common type of DDoS attack. They work by overwhelming the target with a high volume of traffic, such as many requests or data packets. This type of attack is designed to consume the target’s bandwidth, making it difficult for legitimate traffic to reach the target.

  1. Protocol Attacks

Protocol attacks target the protocols used to transmit data over the internet. These attacks are designed to exploit vulnerabilities in the target’s infrastructure, such as routers and switches, to disrupt the normal flow of traffic.

  1. Application Layer Attacks

Application layer attacks target the applications running on a website or online service. These attacks are designed to exploit vulnerabilities in the application itself, such as SQL injection or cross-site scripting (XSS), to disrupt the normal functioning of the application.

Effects of DDoS Attacks

DDoS attacks can have a significant impact on a website or online service. They can cause the target to become unavailable to users, impacting their ability to access the website or online service. This can result in a loss of business, damage to the target’s reputation, and a decrease in user trust.

Protecting Against DDoS Attacks

There are several strategies that organizations can use to protect themselves against DDoS attacks. These include implementing firewalls, using traffic filtering and traffic shaping technologies, and leveraging cloud-based DDoS protection services. Organizations can also take steps to improve their overall network infrastructure, such as upgrading to more secure routers and switches and improving the security of their servers and endpoints.


In conclusion, DDoS attacks are a major threat to websites and online services. By understanding how DDoS attacks work and the types of attacks that can be launched, organizations can take steps to protect themselves and prevent disruptions to their online services.

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Author - Rutuja


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