NIST Draft Definition of Cloud Computing

Peter Mell, Project Lead for the NIST Cloud Computing group has released a Draft Working Definition of Cloud Computing:
Definition of Cloud Computing:
Cloud computing is a model for enabling convenient, on-demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction. This cloud model promotes availability and is composed of five essential characteristics, three delivery models, and four deployment models.
Essential Characteristics are listed as: on-demand self-service, ubiquitous network access, location independent resource pooling, rapid elasticity, and measured Service.

Delivery Models are listed as: Software as a Service (SaaS), Platform as a Service (PaaS), and Infrastructure as a Service (IaaS)

Deployment Models can be one of: private cloud, community cloud, public cloud, hybrid cloud.

Src: Cloud Computing | Computer Security Resource Center | Computer Security Division | NIST.gov

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