Identify the three primary cloud service models.

Identify the three primary cloud service models.

• A. Software, Platform, Infrastructure
• B. Public, Private, Hybrid
• C. IaaS, PaaS, SaaS
• D. Servers, Storage, Networking

Answer: (C)

Cloud service offerings are layered by who manages what: infrastructure, platform, and software. The three primary models are Infrastructure as a Service, Platform as a Service, and Software as a Service. In Infrastructure as a Service, the provider supplies the fundamental building blocks—virtual machines, storage, and networks—while you control the operating system, applications, and data, giving you flexibility and responsibility for the software stack. In Platform as a Service, you focus on developing and deploying your applications, while the provider handles the underlying runtime environment, middleware, and servers, simplifying scalability and maintenance. In Software as a Service, the provider delivers access to complete applications over the internet; you just use the software, with everything from the infrastructure to the application upkeep managed for you. The other options mix up different ideas: one describes where resources are hosted (public, private, hybrid), which is about deployment models, not the service level. The last option points to the basic IT resources themselves (servers, storage, networking), which are components rather than service models. Understanding these three service models helps clarify how control and responsibility shift between you and the cloud provider as you move from raw resources to fully managed software.

Cloud service offerings are layered by who manages what: infrastructure, platform, and software. The three primary models are Infrastructure as a Service, Platform as a Service, and Software as a Service. In Infrastructure as a Service, the provider supplies the fundamental building blocks—virtual machines, storage, and networks—while you control the operating system, applications, and data, giving you flexibility and responsibility for the software stack. In Platform as a Service, you focus on developing and deploying your applications, while the provider handles the underlying runtime environment, middleware, and servers, simplifying scalability and maintenance. In Software as a Service, the provider delivers access to complete applications over the internet; you just use the software, with everything from the infrastructure to the application upkeep managed for you.

The other options mix up different ideas: one describes where resources are hosted (public, private, hybrid), which is about deployment models, not the service level. The last option points to the basic IT resources themselves (servers, storage, networking), which are components rather than service models. Understanding these three service models helps clarify how control and responsibility shift between you and the cloud provider as you move from raw resources to fully managed software.