Cloud Computiing

Cloud computing is internet based computing with shared computing resources that are virtualized and accessed as a service, through an API.The main Objective of cloud computing is to provide easy and scalable acess to computing resources and IT services and to share resources over the Internet without actually purchasing them.

Most cloud computing customers do not own the physical infrastructure. They usually rent usage from a third-party provider. Services in cloud computing infrastructure are delivered through common centers and built on servers. Clouds often operate as single points of access for all consumers' computing needs. There are three main characteristics which distinguish it from traditional hosting. Firstly the resources are consumed as a service and paid only for what is used like the traditional utility services. Then it is elastic which means a user can have as much or as little of a service as they want at any given time. Also the service is fully managed by the provider. So consumer needs to have only a personal computer and Internet access.

Public/ external, private/ internal , hybrid and community cloud are classifications of cloud computing. Several organizations with similar requirements can get together and establish a community cloud to share their infrastructure. You can get an idea about other clouds through the below diagram.

Amazon, Google, Microsoft are providing cloud computing services to the cloud.
Cloud computing concept is very essential for the future world. There the provider earn money by selling products. And also the client saves his/ her money as no need to purchase all needed infrastructure and services as we can burrow it for only the needed time.