The National Institute of Standards and Technology defines five essential characteristics:
- On-demand self-service: You can provision things such as servers and storage as needed and without interacting with someone.
- Broad network access: Your cloud resources are accessible over the internet (if enabled) by various methods, such as web browser or mobile phone.
- Resource pooling: Cloud providers pool their servers and storage capacity across many customers using a multi-tenant model. Resources, both physical and virtual, are dynamically assigned and reassigned as needed. The specific location of resources is unknown and generally unimportant.
- Rapid elasticity: Your resources can be elastically created and destroyed. ...