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Difficulty: MediumShared Responsibility Model

A company currently hosts its customer portal on Azure Virtual Machines. The IT team plans to migrate this application to Azure App Service (a Platform as a Service/PaaS model) to reduce administrative overhead.

Which two responsibilities will shift from the customer to Microsoft after this migration? (Select two.)

  1. Patching and maintaining the underlying operating systemAnswer
  2. B
    Securing the physical datacenter hosting the servers
  3. Managing and updating the web server middleware and runtime environmentAnswer
  4. D
    Configuring access controls and governance for user data

Answer

The responsibilities that shift to Microsoft are patching and maintaining the underlying operating system, as well as managing and updating the web server middleware and runtime environment.
Migrating from Infrastructure as a Service (IaaS) to Platform as a Service (PaaS) reduces the customer's administrative burden. The customer is no longer responsible for operating system patching or installing and configuring middleware/runtimes; Microsoft handles these tasks automatically.

Step-by-Step Solution

1
Analyze the current state (IaaS) and the target state (PaaS) in the context of the Shared Responsibility Model.
Identify that the customer is currently running Virtual Machines (IaaS) and is migrating to Azure App Service (PaaS).
This establishes the transition boundary from IaaS to PaaS.
2
Determine which responsibilities shift from the customer to Microsoft during an IaaS-to-PaaS transition.
Operating system maintenance and runtime/middleware management shift to Microsoft. Physical security was already Microsoft's responsibility, and data/access management remains the customer's responsibility.
Applying the Shared Responsibility Model guidelines to identify the changed ownership.

Key Concept

Under the Azure Shared Responsibility Model, migrating from IaaS (Virtual Machines) to PaaS (App Service) shifts the management of the operating system, database engines, and middleware/runtimes from the customer to Microsoft.
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Shared Responsibility Model

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