Which statement about cloud service models is most accurate?

Which statement about cloud service models is most accurate?

• A. Platform-as-a-Service
• B. Software-as-a-Service
• C. Infrastructure-as-a-Service
• D. Network-as-a-Service

Answer: (B)

Understanding who manages the technology stack in cloud service models. Software-as-a-Service is the scenario where the provider hosts the application and takes care of the underlying infrastructure, runtime, and data management, while you simply use the software over the internet. That makes it the most accurate description for a cloud service model because it represents the end-user experience of a fully hosted application with minimal setup on your side. In contrast, Platform-as-a-Service offers a platform to develop and deploy your own applications, but you still manage the application logic and data while the provider handles the platform and underlying infrastructure. Infrastructure-as-a-Service provides raw computing resources, and you’re responsible for the operating system, middleware, and applications. Network-as-a-Service focuses on delivering networking capabilities, which isn’t one of the core software-delivery service models in the same sense. Examples of SaaS include Gmail or Salesforce, while PaaS examples are Google App Engine or Heroku, and IaaS examples include AWS EC2.