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

A university computer science department is planning to deploy a web application for student assignment submissions. The department requires full administrative control over the guest operating system, network configuration, and middleware installation to support custom security tools, but wants the cloud provider to handle the physical server hardware and hypervisor infrastructure. Which cloud service model best meets 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) is the correct cloud service model.
Infrastructure as a Service (IaaS) provides virtualized server instances (VMs) where the subscriber retains administrative management of the operating system, storage, network components, and installed middleware, while the cloud provider manages the physical data center hardware, power, cooling, and hypervisor layer.

Step-by-Step Solution

1
Analyze the customer's administrative requirements
The requirement specifies full root/administrator access to manage the operating system, middleware, and network configuration.
Identifying the layer of control required by the customer narrows down the shared responsibility model.
2
Evaluate the provider's responsibility scope
The provider is responsible only for physical hardware, facility security, and the hypervisor layer.
This division places infrastructure hardware on the provider while leaving OS and software management to the subscriber.
3
Match the scope of control to the cloud service model
Infrastructure as a Service (IaaS) provides virtual machines where subscribers manage the OS and software stack while providers manage physical assets.
PaaS and SaaS abstracts the operating system layer away from the customer.

Key Concept

Cloud Service Models and Shared Responsibility
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Topics

Cloud Service Models (IaaS, PaaS, SaaS)

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