Denial of Service

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Definitions

National Definitions

Australia

Denial of service: Deliberate compromise of the availability of IT systems. [1]


Denial-of-Service (DoS): An attack that is used to stop an online system (such as a website) from being available to legitimate users. [2]

These attacks often flood targeted systems with requests until they are unable to respond.

France

Déni de service (DoS): attaque informatique ayant pour but de rendre indisponible un service en submergent ses ressources informatiques de traffic inutile. Lorsque l'attaque est conduite à l'aide de plusieurs source de traffic malveillant, on parle de déni de service distribué (DDoS). [3]


Liberia

Denial-of-service attack: Flooding the networks or servers of individuals or organizations with false data requests so they are unable to respond to requests from legitimate users. [4]



Senegal

Dénis de services distribués (« DDoS »: un type d’attaque rendant un service inaccessible aux bénéficiaires habituels du service. Il s’agit d’ne technique perturbant fortement le fonctionnement normal du système par un grand nombre de requêtes. [5]



United Kingdom

Distributed denial-of-service attack: Where many networked devices try to communicate with another at the same time, causing the targeted device to be significantly slower to respond or cease to function. [6]



United States

DHS
Denial of Service is an attack that prevents or impairs the authorized use of information system resources or services. [7]


Distributed denial of service is a Denial of Service technique that uses numerous systems to perform the attack simultaneously. [7]


NIST
Denial of Service: Actions that prevent the system from functioning in accordance with its intended purpose (from: NIST SP 800-24) [8]


Denial of Service: The prevention of authorized access to resources or the delaying of time-critical operations. (Time-critical may be milliseconds or it may be hours, depending upon the service provided) (from: NIST SP 800-27 Rev A) [8]


Denial of Service: The prevention of authorized access to resources or the delaying of time-critical operations. (from: NIST SP 800-33) [8]



See also

Notes