Availability

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Definitions

European Definitions

ENTSO-E
Availability is a measure of time during which a generating unit, transmission line, ancillary service or another facility is capable of providing service, whether or not it actually is in service. [1]


International Definitions

ITU-T

The property of being accessible and useable upon demand by an authorized entity. [2]


Disponibilité: Propriété d'être accessible et utilisable sur demande par une entité autorisée. [3]


Disponibilidad: Propiedad de ser accesible y utilizable a petición por una entidad autorizada. [4]


可用性: 能够根据授权实体的要求进行访问和使用的特性. [5]


National Definitions

Brazil

Disponibilidade: propriedade de que a informação esteja acessível e utilizável sob demanda por uma pessoa física ou determinado sistema, órgão ou entidade. [6]
Availability is the property that the information is accessible and usable upon demand by an individual or certain system, agency or entity.


Cameroon (Cameroun)

Disponibilité: critère de sécurité permettant que les ressources des réseaux de communications électroniques, des systèmes d’information ou des équipements terminaux soient accessibles et utilisables selon les besoins (le facteur temps). [7]


Canada

The state of being accessible and usable in a timely and reliable manner.
Condition d’être accessible et utilisable de manière fiable et en temps opportun. [8]


Czech Republic

Property of availability and usability at the request of an authorized entity (Vlastnost přístupnosti a použitelnosti na žádost autorizované entity). [9]


India

The extent to which information or processes are reasonably accessible and usable upon demand, by an authorised entity, allowing authorised access to resources and timely performance of time-critical operations. [10]


United States

NIST
Ensuring timely and reliable access to and use of information. [11]


DHS
The property of being accessible and useable upon demand by an authorized entity. [11]


Standard Definition

ISO/IEC 27000:2014

Property of being accessible and usable upon demand by an authorized entity[12].


See also

Notes

  1. ENTSO-E Glossary of Terms
  2. ITU Security in Telecommunications and Information Technology: An overview of issues and the deployment of existing ITU-T Recommendations for secure telecommunications, ITU-T, Geneva (2012) - ITU-T H.235.
  3. Sécurité dans les télécommunications et les technologies de l’information: Aperçu des problèmes et présentation des Recommandations UIT-T existantes sur la sécurité dans les télécommunications, ITU-T, Geneva (2012) - ITU-T X.800.
  4. Seguridad de las telecomunicaciones y las tecnologías de la información: Exposición general de asuntos relacionados con la seguridad de las telecomunicaciones y la aplicación de las Recomendaciones vigentes del UIT-T, ITU-T, Geneva (2012) - ITU-T X.800.
  5. 关于电信安全的若干议题综述 及相关ITU-T建议书应用简介, ITU-T, Geneva (2012) - ITU-T H.235.
  6. GUIA DE REFERÊNCIA PARA A SEGURANÇA DAS INFRAESTRUTURAS CRÍTICAS DA INFORMAÇÃO Versão 01 (Nov. 2010)/ Instrução Normativa Nº 1, de 13 de junho de 2008. Gabinete de Segurança Institucional da Presidência da República.
  7. LOI N°2010/012 DU 21 DECEMBRE 2010 RELATIVE A LA CYBERSECURITE ET LA CYBERCRIMINALITE AU CAMEROUN
  8. Vocabulaire de la gestion des urgencies/Emergency Management Emergency Management Vocabulary 281 (2012)
  9. Cyber Security Explanatory Glossary (2013)
  10. India's DGQA Cyber Security Policy (2015)
  11. 11.0 11.1 NISTIR 7298 rev 2: Glossary of Key Information Security Terms, May 2013
  12. ISO/IEC 27000:2014, Information technology -- Security techniques -- Information security management systems -- Overview and vocabulary