Explanation:
The correct answer is D. An Azure Availability Zone can be used to protect against the failure of an Azure data center. Availability Zones are physically separate zones within an Azure region, each with independent power, networking, and cooling. By architecting solutions with replicated VMs across zones, applications and data are protected from the loss of a datacenter.
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In the context of Azure services, which of the following failures can be mitigated by using an Azure Availability Zone?
A
a physical server failure
B
an Azure region failure
C
a storage failure
D
an Azure data center failure