I need some assistance with these assignment. computer shop limited (csl) Thank you in advance for the help! Cloud Computing Service Models The organization’s data center provides hardware and software services. These services are provisioned by the Cloud Computing applications on the web. Similarly, the Internet services that are provided via cloud computing are called as ‘Software as a Service’ SaaS. The vendors use the term Infrastructure as a service ‘IaaS’ and Platform as a service ‘PaaS’ in order to display their products and services. Due to huge variations, the terms that are explained here are not accepted worldwide. The department of commerce NIST (National Institute of Standards and Technology) defined some useful explanations that are based on three concepts Simple computing resources regarding Cloud infrastructure as a service ‘IaaS’ are provided. Software applications are accessed by Cloud Software as a service ‘SaaS’ that can operate cloud infrastructure. For implementing and developing applications along with programming language and tools, the Cloud Platform as a service ‘PaaS’ provides to the customers. The data center hardware and software contains the major components of a cloud. The resources are available for general public also referred as public clouds and the cloud service providers are known as utility computing. Furthermore, the clouds that are not accessible for public are called as private clouds. The combination of the two, ‘SaaS’ and utility computing forms Cloud 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 the 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).
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