Which cloud service model would you select if you want access to virtual machines and storage while managing your own operating system and applications?

• A. IaaS
• B. PaaS
• C. SaaS
• D. DaaS

Answer: (A)

You're being tested on the level of control you have over cloud resources. If you want access to virtual machines and storage while still managing your own operating system and applications, the model that fits best is IaaS. In Infrastructure as a Service, the provider supplies the fundamental building blocks—virtual machines, storage, and networking—and you handle the operating system, the software you install, patches, configuration, and data. This gives you the most control over the environment and lets you tailor the OS and apps exactly as needed, while the provider takes care of the underlying hardware and connectivity. In contrast, the platform models bundle more up with the runtime and platform services, limiting how much you can customize the operating system or runtime; and the software-focused models deliver applications with little to no control over the underlying environment. DaaS centers on delivering a desktop experience rather than providing full OS and software control.