What is a DDoS attack?

D2 ยท Threats  ยท  CompTIA Security+ SY0-701
A DDoS (Distributed Denial of Service) attack uses many compromised machines (a botnet) to flood a target with traffic, making services unavailable. It attacks the Availability pillar of the CIA triad.

Common types: volumetric (bandwidth flood), protocol (SYN flood, Ping of Death), application layer (HTTP GET flood, Slowloris).
DoS = one attacker. DDoS = many attackers (botnet). Mitigations include rate limiting, scrubbing centers, and CDN-based protection.
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