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A model for enabling ubiquitous, 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 model is composed of five essential characteristics, three service models, and four deployment models.
Essential Characteristics:
On-demand self-service.
Broad network access.
Resource pooling.
consumer demand.
Rapid elasticity.
Measured service.
What is Cloud Computing?