An Overview of Service Models of Cloud Computing

Abstract

Since its inception Cloud Computing is making a paradigm shift in the world of computing technology. Based on pay-per-use principle it provides a variety of services to both individual and industry. The services it provides include Platform-as-a-Service (PaaS), Software-as-a-Service (SaaS) and Infrastructure-as-a-Service (IaaS) and it is still making its way to other similar services. These services models have certain requirements to be met and other security and design issues. This paper aims at discussing these three services models, important factors for these models and challenges currently faced by these services models.