SAP-C02 Question 102
Select 4A company is running a multi-tier web application on AWS. The application consists of an Auto Scaling group of Amazon EC2 instances behind an Application Load Balancer (ALB) in a single region. The database tier is hosted on Amazon RDS for MySQL. The company is expanding globally and wants to ensure that users from different geographic locations experience low latency while accessing the application. Which combination of solutions will achieve this goal?
- A
Use Amazon CloudFront to cache static content and configure the ALB as the origin.
- B
Enable AWS Global Accelerator for the Application Load Balancer.
- C
Deploy additional Auto Scaling groups in different regions and configure latency-based routing in Amazon Route 53.
- D
Migrate the database tier to Amazon Aurora Global Database.
- E
Replace the Application Load Balancer with a Network Load Balancer to reduce latency.
Show answer and explanation
Correct answers: A, B, C, D
Explanation
To ensure low latency for global users, a combination of solutions is required. Amazon CloudFront and AWS Global Accelerator improve performance for static and dynamic content. Deploying Auto Scaling groups in multiple regions with latency-based routing ensures users are directed to the nearest region. Finally, Amazon Aurora Global Database ensures low-latency database access for global traffic. Replacing the ALB with an NLB is not suitable as it would remove critical Layer 7 capabilities required by the application.
- A. Correct.
Using Amazon CloudFront can help cache static content at edge locations globally, which reduces latency for users accessing static assets. Configuring the ALB as the origin ensures dynamic content is still handled correctly.
- B. Correct.
AWS Global Accelerator provides static IP addresses and utilizes the AWS global network for routing traffic, improving performance and reducing latency for global users.
- C. Correct.
Deploying additional Auto Scaling groups in different regions and using latency-based routing in Route 53 allows traffic to be routed to the region with the lowest latency for each user.
- D. Correct.
Amazon Aurora Global Database replicates data across multiple regions with low latency, which ensures the database tier is performant and resilient for global access.
- E. Incorrect.
Replacing the ALB with a Network Load Balancer is not relevant in this case, as the ALB is designed for HTTP/HTTPS traffic and provides features like host-based and path-based routing, which are critical for this web application.