SAA-C03 Question 320
Select 2A company is running a web application on an Auto Scaling group of Amazon EC2 instances behind an Application Load Balancer (ALB). The company wants to improve the availability and resiliency of its application by protecting against potential outages in a single AWS Region. How can the company achieve this with the LEAST operational overhead?
- A
Deploy the application in multiple AWS Regions using separate Auto Scaling groups and Application Load Balancers, and configure Route 53 with a failover routing policy.
- B
Deploy the application in multiple AWS Regions using separate Auto Scaling groups and Application Load Balancers, and configure Route 53 with a weighted routing policy.
- C
Enable Multi-AZ deployments for the Auto Scaling group and Application Load Balancer.
- D
Use AWS Global Accelerator to route traffic to the application across multiple AWS Regions.
- E
Deploy the application in multiple Availability Zones within the same AWS Region using a single Application Load Balancer.
Show answer and explanation
Correct answers: A, D
Explanation
To achieve high availability and resiliency across AWS Regions, you need to deploy the application in multiple Regions and use tools like Route 53 with a failover policy or AWS Global Accelerator to route traffic efficiently. These approaches ensure traffic is redirected to a healthy Region during Regional outages, meeting the scenario's requirements for improving resilience with minimal operational overhead.
- A. Correct.
Correct. Deploying the application in multiple AWS Regions and using Route 53 with a failover routing policy provides high availability and resilience against Regional failures. This setup ensures traffic is routed to a healthy Region in case of an outage in the primary Region.
- B. Incorrect.
Incorrect. While a weighted routing policy in Route 53 can distribute traffic across Regions, it does not automatically provide failover capabilities. It is primarily used for fine-tuned traffic distribution rather than resilience.
- C. Incorrect.
Incorrect. Multi-AZ deployments improve availability within a single Region but do not protect against a Regional outage. This option does not meet the requirements of the scenario.
- D. Correct.
Correct. AWS Global Accelerator provides a global static IP and routes traffic across multiple Regions based on health and performance, improving both resiliency and availability with minimal operational overhead.
- E. Incorrect.
Incorrect. Deploying the application across multiple Availability Zones within a single Region improves availability within that Region but does not address cross-Region resilience in case of a Regional outage.