AWS Certified Solutions Architect – Professional — Question 223

A Solutions Architect needs to design a highly available application that will allow authenticated users to stay connected to the application even when there are underlying failures.
Which solution will meet these requirements?

Answer options

• A. Deploy the application on Amazon EC2 instances. Use Amazon Route 53 to forward requests to the EC2 instances. Use Amazon DynamoDB to save the authenticated connection details.
• B. Deploy the application on Amazon EC2 instances in an Auto Scaling group. Use an internet-facing Application Load Balancer to handle requests. Use Amazon DynamoDB to save the authenticated connection details.
• C. Deploy the application on Amazon EC2 instances in an Auto Scaling group. Use an internet-facing Application Load Balancer on the front end. Use EC2 instances to save the authenticated connection details.
• D. Deploy the application on Amazon EC2 instances in an Auto Scaling group. Use an internet-facing Application Load Balancer on the front end. Use EC2 instances hosting a MySQL database to save the authenticated connection details.

Correct answer: B

Explanation

Option B is correct since it combines an Auto Scaling group with an Application Load Balancer, ensuring high availability and efficient handling of requests. Options A, C, and D lack the benefits of Auto Scaling and a dedicated load balancer, compromising on fault tolerance and scalability.