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Zorluk: OrtaAzure Regions, Availability Zones, and Region Pairs

A retail company is deploying a point-of-sale (POS) synchronization service to Azure. To protect the service from a natural disaster that could impact an entire geographic region, the architect proposes deploying the service across two Availability Zones within the same Azure region. The architect asserts that Availability Zones are located at least 300 miles apart to ensure regional disaster recovery. Is this statement regarding Azure Availability Zones true or false?

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The statement is false because Azure Availability Zones are located within the same region to ensure low-latency connections, whereas Azure Region Pairs are separated by at least 300 miles to protect against regional disasters.
The statement is false because Azure Availability Zones are designed for high availability and local datacenter isolation within a single region, not for regional disaster recovery. To support low-latency communication, they are located relatively close to each other. Region-wide disaster recovery is instead achieved by using Azure Region Pairs, which are separated by at least 300 miles to minimize the impact of regional disasters.

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1
Analyze the architectural resilience requirement in the scenario.
The scenario requires protection against a natural disaster that could impact an entire geographic region (regional disaster recovery).
Identifying the target resilience level helps determine if Availability Zones or Region Pairs are the correct solution.
2
Evaluate the capabilities and physical boundaries of Azure Availability Zones.
Availability Zones protect against local datacenter failures (power, cooling, and network) within a single region. They are physically separate datacenters in the same region, not separated by hundreds of miles.
This establishes that Availability Zones do not satisfy the distance requirement for regional disaster recovery.
3
Compare the distance properties of Availability Zones and Region Pairs.
Availability Zones are close together for low-latency sync. Azure Region Pairs are designed for disaster recovery and are located at least 300 miles apart.
This confirms that the 300-mile physical separation rule applies to Region Pairs, making the architect's statement about Availability Zones incorrect.

Anahtar Kavram

Azure Availability Zones vs. Region Pairs
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Azure Regions, Availability Zones, and Region Pairs

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