Which cloud model provides virtualized computing resources over the internet?

• A. Platform as a Service (PaaS)
• B. Common Internet Service Types
• C. Cloud Concepts
• D. Infrastructure as a Service (IaaS)

Answer: (D)

The main idea tested is identifying the cloud service model that delivers computing resources as virtualized components over the internet. This is Infrastructure as a Service: you get access to virtual machines, storage, and networks on demand, while you manage the operating system, applications, and data; the provider handles the underlying hardware and virtualization. This contrasts with Platform as a Service, which provides a complete runtime environment for building and deploying apps, and with broader terms like cloud concepts or common internet service types that aren’t specific service models. Examples include AWS EC2, Azure Virtual Machines, and Google Compute Engine.