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Difficulty: MediumInfrastructure as a Service (IaaS)

A media production agency is migrating its high-performance video rendering pipeline to Microsoft Azure. The agency requires full control over the underlying operating systems to install custom codecs and needs to configure complex virtual network routing. The cloud migration team decides to use Azure Virtual Machines and Azure Virtual Networks. Which two statements correctly describe the shared responsibility and operational characteristics of this Infrastructure as a Service (IaaS) deployment?

  1. The agency is responsible for configuring, updating, and patching the guest operating systems on the virtual machines.Answer
  2. B
    Microsoft is responsible for managing and patching the middleware and database engines installed on the virtual machines.
  3. The agency retains control over the configuration of virtual network routing and security rules.Answer
  4. D
    The ongoing costs of running the virtual machines are classified as Capital Expenditure (CapEx) because the agency manages the server configurations.

Answer

The correct statements are that the agency is responsible for configuring, updating, and patching the guest operating systems on the virtual machines, and the agency retains control over the configuration of virtual network routing and security rules.
In an Infrastructure as a Service (IaaS) deployment, the customer is responsible for managing the guest operating system (including OS updates, patches, and configurations) and configuring virtual networking settings (such as routing and network security rules). Microsoft retains responsibility for the physical hosts, physical network, and the virtualization hypervisor.

Step-by-Step Solution

1
Identify the cloud service model represented by the scenario.
The deployment of Azure Virtual Machines and Azure Virtual Networks represents Infrastructure as a Service (IaaS).
The customer is provisioning basic compute and networking resources, giving them the highest level of control over the operating system and network settings.
2
Evaluate the shared responsibility boundary for IaaS resources.
Microsoft manages the physical datacenters, physical network, and the hypervisor layer. The customer manages the guest operating system, middleware, applications, data, and virtual network configurations.
This establishes that the customer is responsible for OS patching and custom network routing, while Microsoft is not responsible for any software running inside the guest VM.
3
Assess the financial implications of the deployment model.
The recurring charges for using cloud infrastructure are billed as ongoing operational costs.
Cloud computing moves expenses from upfront hardware purchases (CapEx) to monthly operational billing (OpEx).

Key Concept

Infrastructure as a Service (IaaS) Shared Responsibility
Estimated Time:1m 30s
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Topics

Infrastructure as a Service (IaaS)

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