CV0-003 · Question #415
A company has implemented a dual-region (Region 1 and Region 2) cloud strategy from its current CSP. Both regions have the same data in them. Region 2 is experiencing an outage. Which of the…
The correct answer is D. Redirect users from Region 2 to Region 1. In a dual-region cloud architecture where both regions hold identical data, redirecting users from the failed region to the healthy region is the fastest and most effective failover response.
Question
A company has implemented a dual-region (Region 1 and Region 2) cloud strategy from its current CSP. Both regions have the same data in them. Region 2 is experiencing an outage. Which of the following is the BEST way to provide service to users in Region 2 during the outage while allowing access to the data?
Options
- ABring the backup instances online and provide Region 2 users access to their data.
- BAdd more network bandwidth to Region 2.
- CCopy Region 1 data to a location in Region 3 and have users access their data.
- DRedirect users from Region 2 to Region 1.
How the community answered
(55 responses)- A13% (7)
- B7% (4)
- C4% (2)
- D76% (42)
Why each option
In a dual-region cloud architecture where both regions hold identical data, redirecting users from the failed region to the healthy region is the fastest and most effective failover response.
Bringing backup instances online is slower and redundant since Region 1 is already operational with the same data, making this an unnecessarily complex recovery path.
Adding network bandwidth to Region 2 addresses a throughput constraint, not a service availability failure, and does nothing to resolve an active outage.
Copying data to a hypothetical Region 3 adds unnecessary latency and complexity when Region 1 already has identical data and is fully available.
Because both regions already contain the same data, routing Region 2 users to Region 1 via DNS failover or a global load balancer provides immediate service continuity with no data loss and no additional provisioning steps. This is the primary purpose of a dual-region strategy - to enable transparent failover during a regional outage without requiring data copies or new infrastructure.
Concept tested: Dual-region failover and traffic redirection strategy
Source: https://learn.microsoft.com/en-us/azure/reliability/cross-region-replication-azure
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