Microsoft Azure Security Engineer Associate AZ-500 Practice Question
You are designing an Azure VM deployment for a high-security workload. The solution must guarantee that data written to OS disks, data disks, the VM's temporary disk, and the host cache is encrypted at rest before leaving the host, while avoiding any integration with Azure Key Vault or customer-managed keys. Which disk-level protection should you use?
Confidential disk encryption for Azure confidential VMs
Azure Disk Encryption (BitLocker/DM-Crypt)
Encryption at host
Server-side encryption with customer-managed keys on managed disks
Encryption at host encrypts data on the Azure compute host itself. Because encryption happens before data is persisted to Azure Storage, it also covers the VM's temporary disk and any host caching. The feature relies on platform-managed keys and therefore does not require Azure Key Vault or customer-managed key configuration. Azure Disk Encryption protects only OS and data disks inside the guest and does not cover the temporary disk or host cache. Server-side encryption with customer-managed keys still needs Key Vault integration and does not secure the temporary disk or cache. Confidential disk encryption applies only to confidential VMs and still requires a supported confidential SKU.
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Microsoft Azure Security Engineer Associate AZ-500
Secure compute, storage, and databases
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