In Azure IaaS, who is responsible for applying guest OS updates on a VM?
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Correct answer: The customer.
Why this is the answer
In Azure IaaS (Infrastructure as a Service), the customer is responsible for applying guest OS updates on a VM. This is a key characteristic of IaaS: Microsoft manages the underlying infrastructure (physical hardware, networking, virtualization), but the customer manages the operating system, applications, and data within the VM. Azure Firewall and Microsoft Defender are security services, not responsible for OS updates. Azure AD is an identity and access management service.
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