A Review on Cloud Computing

“Cloud computing” is recent buzzword in IT world. The future of computing in technical as well social perspective is shown by the phrase. Cloud computing based on the concept of centralizing computation and storage in distributed data centers maintained by third party. This application is much more than simple internet. The main purpose of cloud computing is to provide IT as a service on demand with feature of greater flexibility, scalability, availability, reliability to the cloud users at low cost. Through this user can access the resources they actually reside at the location other than user’s own computer or other Internet connection devices. Cloud computing is a popular computer term which has different interpretations. In computer science by 'cloud' is understood a network of computing devices which work together to provide services. More specifically, in web hosting cloud computing means that all web hosting services (web, ftp, mail, etc) run on many different servers ensuring that a failure in one device will not cause a service failure. In this paper we will discuss about various forms ,cloud services and security risks of cloud computing.