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An organization plans to migrate an on-premises legacy application to Microsoft Azure. The application requires specific operating system customizations, custom software installations, and complete administrative control over the underlying virtual servers and networking.
Which cloud service model should the organization choose for this migration?
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Infrastructure as a Service (IaaS) is a foundational cloud computing model that provides on-demand access to fundamental computing resources, including virtual machines (VMs), storage disks, and virtual networking infrastructure. Under IaaS, the cloud provider manages the physical data centers, host hardware, and physical virtualization layers, while the customer retains full management control over the guest operating system, middleware, runtime environments, and installed software.
Because the organization's legacy application requires specific operating system configurations and complete administrative access, IaaS is the only model that delivers the necessary control over the virtual server environment without forcing architectural code rewrites.
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