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  1. What is a distributed denial-of-service (DDoS) attack?

    A distributed denial-of-service (DDoS) attack is a malicious attempt to disrupt the normal traffic of a targeted server, service or network by overwhelming the target or its surrounding infrastructure with a …

  2. Denial-of-service attack - Wikipedia

    In computing, a denial-of-service attack (DoS attack / dɒs / doss[1]) is a cyberattack in which the perpetrator seeks to make a machine or network resource unavailable to its intended users by …

  3. What Is a DDoS Attack? | Microsoft Security

    A distributed denial-of-service (DDoS) attack targets websites and servers by disrupting network services. Learn about DDoS attacks and how to prevent them.

  4. What is a DDoS Attack? DDoS Meaning, Definition & Types | Fortinet

    Learn about DDoS Attack meaning, attack types, and examples. DDoS Attack means "Distributed Denial-of-Service (DDoS) Attack " and it is a cybercrime in which the attacker floods a server with …

  5. What Is a DDoS Attack? - Cisco

    A distributed-denial-of-service, or DDoS attack is the bombardment of simultaneous data requests to a central server. The attacker generates these requests from multiple compromised systems to …

  6. What Is a DDoS Attack? Types, Examples & Prevention

    Feb 12, 2026 · Learn what a DDoS attack is, how it works, and how to protect your organization. Explore types, real-world examples, and proven mitigation strategies.

  7. What is a DDOS Attack, and How Does It Work? | Okta

    Apr 28, 2025 · A distributed denial-of-service (DDoS) attack occurs when multiple compromised systems coordinate to flood a target’s network, servers, or applications with malicious traffic, exhausting …

  8. DDoS attacks: Definition, examples, techniques, and how to defend …

    What is a DDoS attack? A distributed denial of service (DDoS) attack is when an attacker, or attackers, attempt to make it impossible for a digital service to be delivered. This could be...

  9. What Is a DDoS Attack? - Palo Alto Networks

    Distributed denial-of-service (DDoS) is a tactic and attack pattern rather than a vulnerability. DDoS attacks fall under TA0040: Impact in the MITRE ATT&CK framework, most commonly aligning with …

  10. DDoS Attacks Explained | Office of the Chief Information Security Officer

    Oct 27, 2025 · That’s essentially how a Distributed Denial of Service (DDoS) attack works. Instead of phone lines, attackers target websites or online services. They hijack thousands — even millions — …