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

A company's IT team needs to deploy a custom internal application. They require full control over installing and configuring the operating system, web server middleware, and network settings, while leaving the physical server hardware, storage devices, and hypervisor management to a cloud provider. Which cloud service model best satisfies these 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) provides virtualized servers and infrastructure components where the cloud customer retains full control over the operating system, middleware, and application installations.
Infrastructure as a Service (IaaS) gives the customer direct access to virtual machines and storage resources, allowing full control over operating system installation, system updates, and middleware setup while vendor responsibilities remain at the physical hardware layer.

Step-by-Step Solution

1
Analyze the customer's management responsibilities.
The requirement demands administrative access to install and configure the operating system and middleware.
Identifying the highest level of management required by the organization determines the boundary of shared responsibility.
2
Map responsibilities to cloud service tiers (IaaS vs. PaaS vs. SaaS).
IaaS delegates OS and application management to the customer while offloading physical hardware and hypervisors to the cloud vendor.
PaaS handles the OS and runtime environment automatically, and SaaS manages everything up through the application tier.

Key Concept

Cloud Shared Responsibility Model - Infrastructure as a Service (IaaS)
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Topics

Cloud Service Models (IaaS, PaaS, SaaS)

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