More and more, we are seeing technology as well as enterprises moving to the cloud — an internet-based computing. Cloud computing powers the services of internet giants like Microsoft, Google and Amazon, and companies like Dropbox, Amazon and Netflix exist only because of cloud technologies. Cloud computing relies on sharing computing resources rather than having local servers or personal devices to handle applications. Cloud computing providers provide their services in three standard models like Software as a Service (SaaS), Platform as a Service (PaaS), Infrastructure a Service (laaS).