Cloud computing is defined by the ISO as “a paradigm for enabling network access to a scalable and elastic pool of shareable physical or virtual resources with self-service provisioning and administration on demand”. It is commonly referred to as “the cloud”.
Characteristics
In 2011, the National Institute of Standards and Technology (NIST) identified five “essential characteristics” for cloud systems. Below are the exact definitions according to NIST:
- On-demand self-service: “A consumer can unilaterally provision computing capabilities, such as server time and network storage, as needed automatically without requiring human interaction with each service provider.”
- Broad network access: “Capabilities are available over the network and accessed through standard mechanisms that promote use by heterogeneous thin or thick client platforms (e.g., mobile phones, tablets, laptops, and workstations).”
- Resource pooling: ” The provider’s computing resources are pooled to serve multiple consumers using a multi-tenant model, with different physical and virtual resources dynamically
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Source: Wikipedia
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