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Difficulty: MediumCloud Service Models (IaaS, PaaS, SaaS)

A healthcare provider plans to host a specialized medical records portal. The organization's IT operations team requires full root-level control over the operating system installation, web server middleware configuration, and security patching, while relying on the cloud vendor to supply and maintain the physical host hardware, storage arrays, and hypervisors. Which cloud service model should the organization select to meet these technical requirements?

  1. Infrastructure as a Service (IaaS)Answer
  2. B
    Platform as a Service (PaaS)
  3. C
    Software as a Service (SaaS)
  4. D
    Desktop as a Service (DaaS)

Answer

Infrastructure as a Service (IaaS) is the correct cloud service model because it grants the customer complete control over operating systems, middleware, and network configurations while the vendor manages the physical hardware and hypervisor layers.
Infrastructure as a Service (IaaS) provides virtual machines and infrastructure components where the cloud vendor is responsible for physical hardware, facilities, and virtualization hypervisors, while the customer maintains administrative authority over operating systems, software runtimes, middleware, and security configurations.

Step-by-Step Solution

1
Analyze the customer control requirements stated in the scenario.
The IT operations team requires administrative control over OS installation, middleware, and security patching.
Identifying the highest level of administrative responsibility determines the cloud service layer required.
2
Identify the provider responsibility scope.
The cloud vendor maintains physical host hardware, storage infrastructure, and hypervisors.
Under the shared responsibility model, managing hardware and virtualization while delegating OS management to the customer is characteristic of IaaS.
3
Map the shared responsibility boundary to the cloud service model.
Infrastructure as a Service (IaaS) matches the specified division of responsibilities.
IaaS provides bare virtual computing components (VMs, storage, networks) allowing administrators full OS-level management.

Key Concept

Cloud Service Shared Responsibility Boundaries (IaaS vs. PaaS vs. SaaS)
Estimated Time:1m 15s
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Topics

Cloud Service Models (IaaS, PaaS, SaaS)

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