As a Cloud User:
- No worry of control of underlying IT infrastructure.
- Cloud systems is elastics can expand and shrink as required.
As Cloud Service Provider
- A new IT service delivery model based on consumption( more like power/water utiliities).
- Need to provision highly scalable and virtualised IT resources.
Definition quoted from NIST website
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
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