Cloud Computing Services And Service Providers - A Review

Cloud computing is a technology which uses internet (or public Internet) and central servers to provide computation, software, data access and storage. End user does not require any knowledge of the physical location and configuration of the system that delivers the services. It provides an always available service for the users, provided that the user takes care of the last mile connectivity.
With cloud computing, user can perform routine computer tasks anywhere, at any time, without installing applications. All users need a computer connected to the internet (or public Internet as the case may be) and a compatible application running on the computer.
How Cloud computing works:
Cloud means a grid of computing machines in a service-oriented architecture to deliver the solution to the customer. Most websites and server-based applications run on particular computers or servers. The applications are stored on these cloud and accessed by the user without knowing server configurations. A lot of the software that people use nowadays is completely web-based. For example, if you are hosting your website on a local server or from your PC, you must usually select a particular operating system (Windows/Linux/Mac), to determine what software you can run on that particular server. If your site is being hosted in the cloud, there is no need to do that. You can run Windows and Linux programs side by side.
Types of cloud computing:
Based on where the cloud is hosted also referred as Cloud computing Deployment models:
Public cloud: This is standard computing model. The computing infrastructure can be shared among several people or organizations with similar requirements. The user need not worry about the location of the cloud-computing infrastructure and it is transparent to the user. Several public cloud services offered free of charge to Internet users and discussed in the article.
Private: Computing architecture is dedicated to the customer and is not shared with other organizations and managed internally or by a third-party. A private cloud may be hosted internally or externally. They are expensive and are considered more secure than Public Clouds.
Community cloud: Community cloud shares infrastructure between several organizations from a specific community with common concerns (security, compliance, jurisdiction, etc.). A Community cloud may be hosted and managed managed internally or by a third-party. The costs are borne by several organizations, thus reducing the running cost significantly and providing better security and resources compared with a Public cloud.
Hybrid cloud: Hybrid cloud is a combination of two or more clouds (private, community, or public) that remain unique entities but are bound together, offering the benefits of multiple deployment models. It can also be defined as multiple cloud systems that are connected in a way that allows programs and data to be moved easily from one deployment system to another.
For a complete article on Cloud Computing, please visit tutorialsweb.com. The contents of the article include Introduction to virtualization, description of cloud computing, diferences between virutalization and cloud computing, different types of cloud models, and some prominent cloud service providers including Amazon, Google, and Microsoft. http://www.turorialsweb.com