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Difficulty: HardAzure Regions, Availability Zones, and Region Pairs

Evaluate the following statement regarding Azure architectural resiliency: 'To protect against a region-wide outage, Azure Region Pairs are configured to perform synchronous data replication to ensure zero data loss, while automatically guaranteeing that all customer data remains within the same geopolitical boundary.' Is this statement true or false?

Answer: Answer

Answer

The statement is false.
The statement is false. Azure Region Pairs replication is asynchronous to avoid performance degradation over the required physical distance separation of 300 miles or more. Additionally, not all region pairs guarantee data residency within the same geopolitical boundary, as exemplified by Brazil South being paired with South Central US.

Step-by-Step Solution

1
Analyze the replication type used by Azure Region Pairs.
Replication across Azure Region Pairs is asynchronous.
Because paired regions are physically separated by at least 300 miles to mitigate regional disasters, synchronous replication would introduce unacceptable network latency for applications.
2
Evaluate the data residency guarantees of Azure Region Pairs.
Data residency within the same geopolitical boundary is not guaranteed for all pairs.
Although most pairs are within the same geography, exceptions exist (e.g., Brazil South is paired with South Central US) which means data can traverse geopolitical boundaries during disaster recovery replication.
3
Determine the truth value of the overall statement.
The statement is false.
Both claims in the statement—that replication is synchronous and that all customer data is guaranteed to remain in the same geopolitical boundary—are incorrect.

Key Concept

Azure Region Pairs replication characteristics and data residency boundaries
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Topics

Azure Regions, Availability Zones, and Region Pairs

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