Which cloud service model provides virtualized computing resources over the Internet?

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

Answer: (B)

Providing virtualized computing resources over the Internet describes Infrastructure as a Service. In this model, you rent virtual machines, storage, and networking from a cloud provider and you manage the operating system, applications, and data yourself, while the provider handles the underlying hardware and virtualization. The other options offer higher-level services: Platform as a Service gives you an environment to run apps with the provider managing the runtime and OS; Software as a Service delivers complete applications you use; and Function as a Service runs small chunks of code in response to events without you provisioning servers. So the best fit for virtualized computing resources is Infrastructure as a Service.