Microsoft Azure Architect Technologies (AZ-300) Practice Exam

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What type of replication allows data consistency between data centers within a single region?

Local replication
Zonal replication
Regional replication
Geographic replication

The correct answer is: Zonal replication

Zonal replication is designed to provide data consistency between data centers within a single region by ensuring that data is replicated across multiple availability zones within that region. Each availability zone is typically an isolated location with its own power, cooling, and networking, which helps to protect against localized hardware failures. By replicating data across these zones, applications and services can maintain high availability and resilience while keeping data consistent. In contrast, local replication tends to refer to duplicating data within a single instance or hardware, which may not provide the required redundancy at the data center level. Regional replication goes beyond a single region, encompassing multiple geographical regions, thus not fitting the requirement for a single region's data centers. Geographic replication focuses on data consistency across widely distributed locations, which is broader than the single region focus specified in the question.