Software as a Service, Platform as a Service, Infrastructure as a Service − A Review

Cloud services have revolutionized the dynamics of IT industry. Cloud computing provides scalable and virtualized resources as services over the Internet. Cloud offers three types of services: Software as a Service (SaaS), Platform as a Service (PaaS), and Infrastructure as a Service (IaaS). This investigation encapsulates all these services from industry’s point of view, identifies various cloud paradigms promising to deliver these services, and discusses pros & cons of these services. This write-up contributes to the knowledge of cloud services by reviewing the benefits and barriers in adopting cloud services, and also predicts the future of cloud services.