Distributed Denial Of Service (DDOS)
Distributed Denial Of Service, or DDOS, is a type of attack where many computers flood a target, like a website or server, with traffic to overwhelm it and make it unavailable.
Often, the DDOS uses an operation on the target that is long or costly, so that the number of requests generates a large load on the server.
https://en.wikipedia.org/wiki/Denial-of-service_attack
See Also
- What Happens When a PHP Application Is DDoSed: A Guide for Beginners to Advanced Developers
- How PHP Vulnerability Leads to DDoS and Malware Attack?