Cloud Computing Service Models Assignment Example | Topics and Well Written Essays - 2750 words

Cloud Computing Service Models - Assignment Example Likewise, the services provided over the Internet are referred as (Software as a Service) ‘SaaS’. There are few sellers who use the term (Infrastructure as a service) ‘IaaS’ and (Platform as a service) ‘PaaS’ in order to demonstrate their products and services. However, these terms are avoided and not accepted globally, due to variation. The Commerce Department’s National Institute of Standards and Technology (NIST) have illustrated some helpful definitions that focus on three concepts (Reese 2009): Cloud infrastructure as a service ‘IaaS’ consists of provisioning elementary computing resources. Cloud software as a service ‘SaaS’ access software application that operates on a cloud infrastructure. Cloud platform as a service (PaaS) provides the accessibility to users for implementing and developing applications with programming language and tools supported by the providers. The core components of a cloud consist of the data center hardware and software. When these resources are publicly available, they are referred as public clouds and the service provided by the cloud is called as utility computing. Moreover, private clouds are only available to private organizations and are not accessible by the public. Accordingly, cloud computing is the combination of ‘SaaS’ and utility computing (ARMBRUST, FOX et al. 2010). There are three service models for cloud computing i.e. infrastructure as a service, platform as a service and software as a service (Wilshusen 2011). Infrastructure as a service (IaaS) is comprised of three components i.e. software, platform and infrastructure. Organizations only provide software and platform and infrastructure is provided by a third party cloud computing vendor. The second service models i.e. platform as a service (PaaS) also comprises of three components i.e. software, platform and infrastructure. Organizations only provide a software or application that will be executed on the third party or the vendor’s platform and infrastructure. The third service model also includes the similar three components as mentioned before and called as software as a service (SaaS). Organizations only utilize the services provided by the vendors in terms of applications that can be accessed by the Internet. All the three components i.e. software, platform and infrastructure are the property of the vendor (Wilshusen 2011). In figure 1.1, cloud deployment models are demonstrated Figure 1.1 (Retreived from :Wilshusen, G. C. (2011). INFORMATION SECURITY: Additional guidance needed to address cloud computing concerns. GAO Reports, , 1.) Cloud computing four service models are shown in Fig 1.2 Figure 1.2 (Retreived from :Wilshusen, G. C. (2011). INFORMATION SECURITY: Additional guidance needed to address cloud computing concerns. GAO Reports, , 1.) ‘Business Cloud’ must choose the relevant client model, as it will be proportional to t he business or customer requirements and may differ from organization to organization and business types. The first service model is called as the ‘Private Cloud’. A private cloud is solely a property of the organization i.e. software, platform and infrastructure is the property of the organization (Wilshusen 2011). The second service model is called as the community cloud that is accessible to several organizations that may be