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

A small organization decides to migrate its legacy on-premises email system to a cloud service. The cloud provider handles all backend hardware maintenance, operating system patches, and email application updates. Employees simply log in to their email accounts via a web browser. Which cloud service model is being utilized?

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

Answer

Software as a Service (SaaS)
Software as a Service (SaaS) delivers complete end-user applications over the internet. Because the cloud vendor manages all underlying hardware, operating system updates, and application maintenance, and employees merely access the finished email service via a web browser, this scenario represents SaaS.

Step-by-Step Solution

1
Analyze customer versus provider responsibilities described in the scenario
The provider handles all server hardware, operating systems, and application maintenance, while the user only accesses the ready-to-use email application.
Differentiating cloud models depends on identifying which layer of the stack (hardware, OS, application, or data) the customer manages.
2
Map the management tier to the standard cloud service model definition
Complete applications delivered over the web without customer management of server software correspond to Software as a Service (SaaS).
SaaS delivers on-demand end-user applications fully hosted and maintained by the vendor.

Key Concept

Cloud Service Models (IaaS, PaaS, SaaS)
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Topics

Cloud Service Models (IaaS, PaaS, SaaS)

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