---
id: "ddos"
kind: "glossary-term"
title: "DDoS attack"
language: "en"
category: "Security and abuse"
updated: "2026-10-04T14:01:23Z"
canonical: "https://tldlog.com/glossary/ddos/"
translations:
  es: "https://tldlog.com/es/glosario/ataque-ddos/"
  de: "https://tldlog.com/de/glossar/ddos-angriff/"
  fr: "https://tldlog.com/fr/glossaire/attaque-ddos/"
  it: "https://tldlog.com/it/glossario/attacco-ddos/"
  pt-BR: "https://tldlog.com/pt/glossario/ataque-ddos/"
  ru: "https://tldlog.com/ru/glossariy/ddos-ataka/"
  zh-Hans: "https://tldlog.com/zh/cihui/ddos-gongji/"
---

# DDoS attack

distributed denial of service

An attack that floods a service with traffic from many machines at once until it stops answering. When the target is a DNS provider, a registry or the root servers, every domain that depends on it can become unreachable. Anycast networks and spare capacity are the main defenses.

## related terms

- [DNS amplification](https://tldlog.com/glossary/dns-amplification/)
- [anycast](https://tldlog.com/glossary/anycast/)
- [botnet](https://tldlog.com/glossary/botnet/)
- [root server](https://tldlog.com/glossary/root-server/)
- [authoritative server](https://tldlog.com/glossary/authoritative-server/)