Cloud Computing
Cloud computing is the delivery of computing as a service rather than a product, whereby shared resources, software, and information are provided to computers and other devices as a metered service over a network.
Cloud Computing Architecture
- Client: A cloud client consists of computer hardware and/or computer software that relies on cloud computing for application delivery.
- Application: Cloud application services deliver software as a service over the Internet, eliminating the need to install and run the application on the customer's own computers and simplifying maintenance.
- Platform: Cloud platform services deliver a computing platform and/or solution stack as a service, often consuming cloud infrastructure and sustaining cloud applications.
- Infrastructure: Cloud infrastructure services deliver computer infrastructure – typically a platform virtualization environment – as a service, along with raw (block) storage and networking.
- Server: The server layer consists of computer hardware and/or software products that are specifically designed for the delivery of cloud services, including multi-core processors, cloud-specific operating systems and combined offerings.
Types of Cloud Computing
- Public cloud: A public cloud is one based on the standard cloud computing model, in which a service provider makes resources, such as applications and storage, available to the general public over the Internet.
- Community cloud: Community cloud shares infrastructure between several organizations from a specific community with common concerns whether managed internally or by a third-party, hosted internally or externally.
- Hybrid cloud: Hybrid cloud is a composition of two or more clouds that remain unique entities but are bound together, offering the benefits of multiple deployment models.
- Private cloud: Private cloud is infrastructure operated solely for a single organization, whether managed internally or by a third-party and hosted internally or externally.
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