Which storage redundancy option replicates data across three Availability Zones within a region?
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Correct answer: ZRS.
Why this is the answer
ZRS (Zone-redundant storage) replicates your data synchronously across three Azure availability zones in the primary region. This ensures high availability and resilience against zonal failures. LRS (Locally redundant storage) replicates data three times within a single data center, offering the lowest cost but no protection against data center outages. GRS (Geo-redundant storage) replicates data to a secondary region, providing protection against regional outages, but it's asynchronous. RA-GRS (Read-access geo-redundant storage) is similar to GRS but allows read access to the data in the secondary region.
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