Which cloud service model provides infrastructure resources on demand without managing underlying hardware?

Which cloud service model provides infrastructure resources on demand without managing underlying hardware?

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

Answer: (C)

Providing infrastructure resources on demand without handling the physical hardware is what Infrastructure as a Service offers. In this model, the cloud provider owns and maintains the actual hardware, data centers, storage, networking gear, and the virtualization layer. You can provision and scale virtual machines, storage, and networks as needed, while you’re responsible for installing and managing the operating systems, applications, data, and security configurations. This separation lets you rapidly adjust resources without buying or maintaining hardware yourself. Other models place more responsibility on you for platform or software layers: Platform as a Service handles the runtime and development tools so you can focus on building apps; Software as a Service delivers ready-made applications; and Desktop as a Service provides virtual desktops rather than raw infrastructure.