ExpertMedium1 markMultiple Choice
AWS SAA-C03 · Question 29 · Domain 2.2: Highly Available Architectures
A web application is deployed across multiple Availability Zones behind an Application Load Balancer (ALB). The EC2 instances are in an Auto Scaling group. During a load test, the architect notices that instances in AZ-A are receiving significantly more traffic than instances in AZ-B, causing CPU overload in AZ-A. How can this be resolved?
A web application is deployed across multiple Availability Zones behind an Application Load Balancer (ALB). The EC2 instances are in an Auto Scaling group. During a load test, the architect notices that instances in AZ-A are receiving significantly more traffic than instances in AZ-B, causing CPU overload in AZ-A. How can this be resolved?
Answer options:
A.
Enable Cross-Zone Load Balancing on the ALB.
B.
Increase the maximum size of the Auto Scaling group.
C.
Change the Route 53 routing policy to Weighted.
D.
Move all instances to a single Availability Zone.
How to approach this question
Identify the feature that balances traffic across AZs. For ALBs, this is Cross-Zone Load Balancing (enabled by default, but the scenario implies it might be off or needs to be ensured).
Full Answer
A.Enable Cross-Zone Load Balancing on the ALB.✓ Correct
Cross-zone load balancing allows the load balancer to distribute incoming requests evenly across all targets in all enabled Availability Zones.
Common mistakes
Thinking Route 53 controls traffic distribution behind a load balancer.
Practice the full AWS SAA-C03 Practice Exam 7
65 questions · hints · full answers · grading
More questions from this exam
Q01A company has multiple AWS accounts in an AWS Organizations organization. The security team needs...MediumQ02An application runs on Amazon EC2 instances and needs to access an Amazon S3 bucket. What is the ...EasyQ03A company wants to implement federated access to the AWS Management Console for its employees usi...MediumQ04A company is building a mobile application that requires users to sign in using their social medi...EasyQ05A security team wants to enforce MFA for all IAM users before they can terminate EC2 instances. H...Medium