What is a DDoS attack?

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Firewalls are like the security guards of a network—they monitor and control incoming and outgoing traffic based on predefined security rules. Their main job is to protect your network from unauthorized access, cyberattacks, and data breaches.

A DDoS attack (Distributed Denial-of-Service attack) is a cyberattack that overwhelms a target’s server, website, or network with massive amounts of traffic from multiple sources, making it slow, unstable, or completely unavailable to legitimate users.

How it works:

  1. Botnet creation – The attacker infects many devices (computers, IoT gadgets, servers) with malware, turning them into “bots” under their control.

  2. Traffic flood – All these bots send requests or data to the target at the same time.

  3. Resource exhaustion – The target’s bandwidth, CPU, or memory is consumed, preventing it from handling normal user requests.

Key features:

  • “Distributed” means the attack comes from thousands (or millions) of devices worldwide, making it harder to block.

  • Often used to disrupt businesses, demand ransom, or as a political or competitive sabotage tactic.

Types of DDoS attacks:

  • Volumetric attacks – Overwhelm bandwidth with huge amounts of data.

  • Protocol attacks – Exploit weaknesses in network protocols to consume server resources.

  • Application layer attacks – Target specific apps or services, sending traffic that looks legitimate but overwhelms them.

Prevention & mitigation:

  • Use DDoS protection services (like Cloudflare, Akamai).

  • Set up firewalls and rate limiting.

  • Use scalable infrastructure that can absorb large traffic spikes.

If you want, I can diagram how a DDoS attack flows from attacker to victim so it’s visually clear.

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