Editing Internet security (section)

=== Denial-of-service attacks ===
{{Main|Denial-of-service attack}}

A [[denial-of-service attack]] (DoS) or distributed denial-of-service attack (DDoS) is an attempt to make a computer resource unavailable to its intended users. It works by making so many service requests at once that the system is overwhelmed and becomes unable to process any of them. DoS may target [[cloud computing]] systems.<ref>{{cite journal|title=Software-Defined Networking (SDN) and Distributed Denial of Service (DDoS) Attacks in Cloud Computing Environments: A Survey, Some Research Issues, and Challenges|first1=Q.|last1=Yan|first2=F. R.|last2=Yu|first3=Q.|last3=Gong|first4=J.|last4=Li|journal=IEEE Communications Surveys and Tutorials|volume=18|issue=1|pages=602–622|doi=10.1109/COMST.2015.2487361|year=2016|s2cid=20786481}}</ref> According to business participants in an international security survey, 25% of respondents experienced a DoS attack in 2007 and another 16.8% in 2010.{{citation needed| reason=no link|date=January 2024}} DoS attacks often use bots (or a botnet) to carry out the attack.