Examkin

Question

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

A financial enterprise is migrating a specialized data analytics workload to a cloud environment. The organization's security policy demands that internal systems administrators retain full administrative control over the guest operating system, including kernel parameter tuning, middleware installation, and OS-level security patch schedules. However, executive management wants to eliminate the financial and operational burden of purchasing physical server hardware, maintaining datacenter facilities, and managing host hypervisors. Which of the following cloud service models best satisfies these technical and operational 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 appropriate cloud service model because it grants full customer control over the guest operating system, kernel configuration, and middleware, while shifting physical hardware, facility management, and hypervisor maintenance to the cloud vendor.
Infrastructure as a Service (IaaS) provides virtual machines and virtual network infrastructure where the cloud provider manages physical hardware, power, cooling, and the hypervisor layer. The tenant retains administrative access to install, configure, and patch the guest operating system, modify kernel settings, and deploy custom middleware.

Step-by-Step Solution

1
Analyze the customer control requirements stated in the scenario.
The customer requires complete administrative control over the guest operating system, kernel parameter tuning, middleware installation, and OS patch schedules.
Identifying the required level of software stack management determines the necessary cloud abstraction tier.
2
Analyze the cloud provider responsibility requirements.
The cloud vendor must handle physical server hardware, datacenter facilities, and hypervisor administration.
This establishes that physical infrastructure and host virtualization are offloaded to the service provider.
3
Map the shared responsibility division to cloud service models.
IaaS delegates physical facilities, hardware, and hypervisors to the provider while reserving OS, middleware, and application control for the tenant.
Platform as a Service (PaaS) and Software as a Service (SaaS) abstract the OS layer away from tenant administrative control, failing the organization's compliance policy requirement.

Key Concept

Cloud Shared Responsibility Model - Infrastructure as a Service (IaaS)
Rate this question

Topics

Cloud Service Models (IaaS, PaaS, SaaS)

More questions from this topic