Cloud Computing and Services
The term, "cloud", represents the availability of the Internet or a large network to perform computing. There are computing services that are delivered by one or more internal computers or from computers outside the organization. External computer resources are known as hosted services. There are different perspectives on the network that provides computing resources to accomplish work. They are described as: an Infrastructrue-as-a-Service (IaaS), a Platform-as-a-Service (PaaS), and Software-as-a-Service (SaaS).
Infrastructure-as-a-Service (IaaS) provides a "virtual" computing server with a unique Internet Protocal (IP) address with supporting disk storage made available on demand. Customers use the service provider's application programming interface (API) to start, stop, access, and configure their virtual server and associated storage. You only pay for the resources you actually use. By analogy, it is just like your use of electricity, telephone, or water. It is often referred to as "Utility Computing".
Somewhat different is the Platform-as-a-Service (PaaS) which provides a defined set of software and software development tools hosted on the provider's platform over the Internet. The use of the provider's application's program interface (API), the website portal and gateway software is installed on the customer's computer. The customer develops their unique application on the hosted (PaaS).
A customer subscribes to a hosted provider that supplies the Infrastructure-as-a-Service, and the application software product so the customer can access the subscribed software product at any time from any place via the Internet. The provider provides both the application and data storage as part of this service. For example, Amazon, Dell, etc.
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IBD also provides Cloud Computing and (SaaS) services click here to learn more.