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Difficulty: MediumReliability, Predictability, and Disaster Recovery

Deploying an application across multiple Availability Zones within a single Azure region ensures that the application remains available if that entire Azure region experiences an outage.

Answer: Answer

Answer

The statement is false because Availability Zones reside within a single Azure region and do not provide protection against an outage that affects the entire region.
The correct answer is false because Availability Zones are bounded by a single region. An outage affecting the entire region will impact all Availability Zones in that region, requiring a multi-region strategy to ensure continuous availability.

Step-by-Step Solution

1
Analyze the scope of the outage described.
The scenario specifies an outage affecting the 'entire Azure region'.
This establishes the scale of the failure the application needs to withstand.
2
Determine the physical boundary of Availability Zones.
Availability Zones are physically separate datacenters located within the same Azure region.
This helps map the relationship between Availability Zones and region boundaries.
3
Evaluate if cross-zone replication protects against a regional outage.
Because all zones in a region are part of that region, a region-wide outage will impact all zones. Surviving a regional outage requires deploying across multiple Azure regions.
This confirms that deploying across multiple Availability Zones within a single region does not protect against a regional outage.

Key Concept

Availability Zones protect against datacenter-level failures within a region, but protecting against region-level outages requires multi-region replication (Disaster Recovery).
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Topics

Reliability, Predictability, and Disaster Recovery

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