Which option lists the cloud service models?

Question

Options

• AInternet as a Service, Platform as a Service, and Storage as a Service.
• BInfrastructure as a Service, Platform as a Service, and Storage as a Service.
• CInfrastructure as a Service, Platform as a Service, and Software as a Service.
• DInternet as a Service, Product as a Service, and Storage as a Service.
• EInternet as a Service, Platform as a Service, and Software as a Service.

• C
  94% (17)
• E
  6% (1)

Explanation

Option C is correct because the three standard cloud service models defined by NIST and widely recognized across the industry are Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS) - these are the foundational categories taught in every major cloud certification (AWS, Azure, GCP, CompTIA Cloud+).

Why the distractors fail:

• A, D, E all include "Internet as a Service," which is not a real cloud service model - it's a fabricated term.
• B replaces SaaS with "Storage as a Service," which is a real concept but a subcategory of IaaS, not a top-level cloud model.
• D also invents "Product as a Service," which has no standard definition in cloud computing.

Memory tip: Use the acronym "IPS" - Infrastructure, Platform, Software - and remember the stack goes from bottom to top: IaaS gives you raw compute/networking, PaaS adds a development environment on top, and SaaS delivers finished applications at the top. If an answer swaps "Software" for "Storage" or replaces "Infrastructure" with "Internet," it's a trap.

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