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An organization plans to migrate a legacy on-premises application to Microsoft Azure without modifying the application code. The IT team requires complete control over the operating system, disk storage, and virtual network configuration to replicate their existing environment.
Which cloud service model should the organization use for this migration?
Infrastructure as a Service (IaaS) is a cloud computing category where a cloud vendor provides fundamental compute, network, and storage resources on demand over the internet. In an IaaS model, the cloud provider manages the physical hardware, data centers, virtualization layer, and physical networking, while the consumer retains direct administrative control over the operating system, middleware, storage disks, installed runtimes, and networking configurations.
Because the organization specifically requires full administrative control over the underlying operating system and must migrate legacy software without code refactoring, IaaS is the only service model that provides the necessary hardware abstraction while maintaining OS-level authority.
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