Question

Difficulty: MediumAzure Regions, Availability Zones, and Region Pairs

A company is planning to migrate its payroll application to Azure. To ensure the application remains online, the lead architect proposes deploying the application across two Availability Zones within the same Azure region. Is the statement that this deployment strategy will protect the application from a region-wide disaster, such as a severe storm that impacts the entire region, true or false?

Answer: Answer

Answer

False
The correct answer is false because Availability Zones only protect against localized failures within a single region's datacenters. A region-wide disaster impacts the entire geographic region, meaning all Availability Zones within that region could be affected simultaneously. Protection against such disasters requires a multi-region deployment strategy, typically utilizing Azure Region Pairs.

Step-by-Step Solution

1
Analyze the proposed deployment strategy and the scope of protection it offers.
Deploying across two Availability Zones within the same Azure region provides redundancy against localized datacenter failures (power, cooling, network) but not region-wide failures.
Availability Zones are physically separate datacenters within a single Azure region.
2
Compare the scope of a region-wide disaster to the boundary of Availability Zones.
A region-wide disaster, such as a major hurricane, impacts the entire region, which includes all Availability Zones within that region.
Since all Availability Zones in a region are in the same geographic area, they are subject to the same region-wide disaster risks.
3
Determine if the statement is true or false.
The statement is false because Availability Zones do not protect against region-wide disasters.
To protect against region-wide disasters, resources must be deployed across multiple regions (e.g., using Azure Region Pairs), not just multiple zones within the same region.

Key Concept

Availability Zones protect against localized datacenter outages within a single region, whereas Region Pairs (multi-region deployments) are required to protect against region-wide disasters.
Estimated Time:1m 0s
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