Which cloud service model involves outsourcing the entire application to cloud providers, resulting in less control for the user?

Which cloud service model involves outsourcing the entire application to cloud providers, resulting in less control for the user?

• A. Software as a Service (SaaS)
• B. Platform as a Service (PaaS)
• C. Middleware
• D. Client-Server Architecture

Answer: (A)

Outsourcing the entire application to cloud providers means the provider runs the app end-to-end and you simply use it. That is the essence of Software as a Service. In this model, you don't manage the underlying infrastructure, runtime, or even the application code beyond basic configuration, and you access the software over the internet (think Gmail, Salesforce, Office 365). Platform as a Service is different: you get a platform to develop and deploy your own applications, so you still control the application logic and data, while the provider manages the runtime and platform infrastructure. Middleware is software that helps different systems or components work together, not a complete service model for delivering an entire application. Client-Server is a traditional architecture pattern, not a cloud service model where the whole app is outsourced.

Outsourcing the entire application to cloud providers means the provider runs the app end-to-end and you simply use it. That is the essence of Software as a Service. In this model, you don't manage the underlying infrastructure, runtime, or even the application code beyond basic configuration, and you access the software over the internet (think Gmail, Salesforce, Office 365).

Platform as a Service is different: you get a platform to develop and deploy your own applications, so you still control the application logic and data, while the provider manages the runtime and platform infrastructure. Middleware is software that helps different systems or components work together, not a complete service model for delivering an entire application. Client-Server is a traditional architecture pattern, not a cloud service model where the whole app is outsourced.