DOP-C02 · Question #289
DOP-C02 Question #289: Real Exam Question with Answer & Explanation
The correct answer is A: Turn off cross-zone load balancing on the ALB. Use Amazon Route 53 Application Recovery. Note that the Elastic Load Balancing resources must have cross-zone load balancing turned off to use this capability. https://docs.aws.amazon.com/r53recovery/latest/dg/arc-zonal-shift.html
Question
A company has an application that runs on Amazon EC2 instances behind an Application Load Balancer (ALB). The EC2 instances are in multiple Availability Zones. The application was misconfigured in a single Availability Zone, which caused a partial outage of the application. A DevOps engineer made changes to ensure that the unhealthy EC2 instances in one Availability Zone do not affect the healthy EC2 instances in the other Availability Zones. The DevOps engineer needs to test the application's failover and shift where the ALB sends traffic. During failover, the ALB must avoid sending traffic to the Availability Zone where the failure has occurred. Which solution will meet these requirements?
Options
- ATurn off cross-zone load balancing on the ALB. Use Amazon Route 53 Application Recovery
- BTurn off cross-zone load balancing on the ALB's target group. Use Amazon Route 53 Application
- CCreate an Amazon Route 53 Application Recovery Controller resource set that uses the DNS
- DCreate an Amazon Route 53 Application Recovery Controller resource set that uses the ARN of
Explanation
Note that the Elastic Load Balancing resources must have cross-zone load balancing turned off to use this capability. https://docs.aws.amazon.com/r53recovery/latest/dg/arc-zonal-shift.html
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