In cloud computing, services are offered by cloud service provider. Users can explore and subscribe services according to their requirement. Users may require infrastructure, development environment or the application to serve their routine work. Accordingly, cloud services are categorized into Infrastructure as a Service (IaaS), Platform as a services (PaaS), Software as a services (SaaS) (Mell & Grance, 2010). Infrastructure requirement such as processor, random access memory (RAM), hard disk, etc., can be accessed from Infrastructure as a Service (IaaS). Variety of service models along with the present trend has been enumerated in the upcoming sub-section.