In cloud computing service models, which category provides virtualized computing infrastructure such as virtual servers, network switches, and block storage?
Answer and explanation
Correct answer: D. Infrastructure as a Service
- Step 1: IaaS delivers fundamental computing infrastructure on demand (e.g., Amazon EC2, Google Compute Engine). Step 2. Users manage the operating system, middleware, and application runtime, while the provider maintains physical hardware. Answer: Infrastructure as a Service. Why not the others: PaaS provides developer environments and runtimes; SaaS provides complete turnkey web applications (e.g., Gmail); FaaS provides serverless event handlers.
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