Cloud computing provides computation, software, data access, and storage services that do not require end-user knowledge of the physical location and configuration of the system that delivers the services. Parallels to this concept can be drawn with the electricity grid, wherein end-users consume power without needing to understand the component devices or infrastructure required to provide the service.
Cloud computing is different from hosting services and assets at ISP data center. It is all about computing systems are logically at one place or virtual resources forming a Cloud and user community accessing with intranet or Internet. So, it means Cloud could reside in-premises or off-premises at service provider location. There are types of Cloud computing like
- Public clouds
- private Clouds
- Inter-clouds or Hybrid Clouds.
Cloud computing describes a new supplement, consumption, and delivery model for IT services based on Internet protocols, and it typically involves provisioning of dynamically scalable and often virtualized resources.
It is a byproduct and consequence of the ease-of-access to remote computing sites provided by the Internet.
This may take the form of web-based tools or applications that users can access and use through a web browser as if the programs were installed locally on their own computers.
Cloud computing providers deliver applications via the internet, which are accessed from web browsers, desktop and mobile apps, while the business software and data are stored on servers at a remote location. In some cases, legacy applications (line of business applications that until now have been prevalent in thin client Windows computing) are delivered via a screen-sharing technology, while the computing resources are consolidated at a remote data center location, in other cases, entire business applications have been coded using web-based technologies such as AJAX.
At the foundation of cloud computing is the broader concept of infrastructure convergence (or Converged Infrastructure) and shared services.
This type of data center environment allows enterprises to get their applications up and running faster, with easier manageability and less maintenance, and enables IT to more rapidly adjust IT resources (such as servers, storage and networking) to meet fluctuating and unpredictable business demand.
Most cloud computing infrastructures consist of services delivered through shared data-centers and appearing as a single point of access for consumers computing needs. Commercial offerings may be required to meet service-level agreements (SLAs), but specific terms are less often negotiated by smaller companies.
