SAA-C03 Question 314
Select 4A company hosts a web application on multiple Amazon EC2 instances behind an Application Load Balancer (ALB) in a single AWS Region. The application is experiencing increased latency as traffic grows. The company wants to ensure the architecture is high-performing and scalable. What changes should the company implement to improve performance and scalability?
- A
Enable cross-zone load balancing on the Application Load Balancer.
- B
Add more EC2 instances to the existing Auto Scaling group.
- C
Deploy the application across multiple AWS Regions and use Amazon Route 53 for DNS-based traffic routing.
- D
Replace the Application Load Balancer with a Network Load Balancer for faster request processing.
- E
Enable AWS Global Accelerator to improve global application performance.
Show answer and explanation
Correct answers: A, B, C, E
Explanation
To ensure a high-performing and scalable network architecture, several strategies can be implemented. Enabling cross-zone load balancing helps distribute traffic evenly across all targets. Adding EC2 instances to the Auto Scaling group ensures the infrastructure can scale with growing demands. Deploying the application across multiple Regions and using Route 53 ensures low-latency access for global users. Using AWS Global Accelerator can further enhance global performance. However, replacing an Application Load Balancer with a Network Load Balancer is not suitable for web applications requiring Layer 7 features.
- A. Correct.
Enabling cross-zone load balancing on the ALB ensures that traffic is distributed more evenly across all targets, regardless of which Availability Zone they are in. This improves performance and resource utilization.
- B. Correct.
Adding more EC2 instances to the Auto Scaling group allows the application to handle increased traffic and scale dynamically as demand grows.
- C. Correct.
Deploying the application across multiple AWS Regions and leveraging Route 53 for traffic routing provides low-latency access to users worldwide and improves fault tolerance.
- D. Incorrect.
While a Network Load Balancer offers lower latency, it is designed for Layer 4 (TCP/UDP) traffic and does not support HTTP/HTTPS features such as host-based or path-based routing, which are critical for most web applications. Therefore, this is not the best choice.
- E. Correct.
AWS Global Accelerator improves global application performance by routing user traffic to the optimal AWS endpoint based on latency and health, ensuring a high-performing architecture.