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Exam AWS Certified DevOps Engineer - Professional DOP-C02 All Questions

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Exam AWS Certified DevOps Engineer - Professional DOP-C02 topic 1 question 304 discussion

Exam question from Amazon's AWS Certified DevOps Engineer - Professional DOP-C02
Question #: 304
Topic #: 1
[All AWS Certified DevOps Engineer - Professional DOP-C02 Questions]

A company's web application uses an Application Load Balancer (ALB) to direct traffic to Amazon EC2 instances across three Availability Zones.

The company has deployed a newer version of the application to one Availability Zone for testing. If a problem is detected with the application, the company wants to direct traffic away from the affected Availability Zone until the deployment has been rolled back. The application must remain available and maintain static stability during the rollback.

Which solution will meet these requirements with the MOST operational efficiency?

  • A. Disable cross-zone load balancing on the ALB's target group. Initiate a zonal shift on the ALB to direct traffic away from the affected Availability Zone.
  • B. Disable cross-zone load balancing on the ALB's target group. Manually remove instances in the target group that belong to the affected Availability Zone.
  • C. Configure cross-zone load balancing on the ALB's target group to inherit settings from the ALB. Initiate a zonal shift on the ALB to direct traffic away from the affected Availability Zone.
  • D. Configure cross-zone load balancing on the ALB's target group to inherit settings from the ALB. Remove the subnet that is associated with the affected Availability Zone.
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Suggested Answer: A 🗳️
by f4b18ba at Nov. 20, 2024, 5:14 p.m.
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f4b18ba
4 days, 9 hours ago
Disable Cross-Zone Load Balancing: Disabling cross-zone load balancing ensures that each Availability Zone handles traffic only for its own targets. This enables the ability to isolate traffic away from a specific zone when needed. Initiate a Zonal Shift: AWS offers Zonal Shift (through AWS Elastic Disaster Recovery or AWS Global Accelerator) to temporarily shift traffic away from a specific Availability Zone. This is highly operationally efficient because it allows automated rerouting without manual changes to target groups or instance configurations. A zonal shift can quickly redirect traffic while maintaining high availability and stability for the application during rollback or testing. Ref -https://docs.aws.amazon.com/r53recovery/latest/dg/arc-zonal-shift.html
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