Denial of Service

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Definitions

National Definitions

United States

DHS
Denial of Service is an attack that prevents or impairs the authorized use of information system resources or services. [1]


Distributed denial of service is a Denial of Service technique that uses numerous systems to perform the attack simultaneously. [1]


NIST
Denial of Service: Actions that prevent the system from functioning in accordance with its intended purpose (from: NIST SP 800-24) [2]


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) [2]


Denial of Service: The prevention of authorized access to resources or the delaying of time-critical operations. (from: NIST SP 800-33) [2]



See also

Notes