Crucial Exams

AWS Certified Solutions Architect Professional SAP-C02 Practice Question

A multinational SaaS provider runs a latency-sensitive REST API in two AWS Regions (us-east-1 and ap-southeast-1). Each Region hosts identical Amazon EC2 instances behind an internet-facing Application Load Balancer (ALB). Latency-based records in Amazon Route 53 direct users to the nearest ALB, and Route 53 health checks confirm both ALBs are healthy.

During periods of public-internet congestion, customers in Europe and South America observe large variations in TLS handshake time and time-to-first-byte-often more than 300 ms-even when the local Region remains healthy. The engineering team wants to lower latency variation for all users without adding a caching layer or changing the existing Regional infrastructure. They also want to avoid exposing multiple Regional DNS names or IP addresses to customers.

Which change will MOST effectively meet these requirements?

  • Replace each ALB with a Network Load Balancer and enable HTTP/3 (QUIC) on the listeners to reduce connection-setup time across the internet.

  • Lower the TTL of the Route 53 latency records to 30 seconds and switch to weighted routing. Use an AWS Lambda function to adjust weights dynamically based on CloudWatch latency metrics.

  • Create an AWS Global Accelerator with two endpoint groups, each containing one Regional ALB, and instruct clients to connect to the accelerator's static Anycast IP addresses.

  • Deploy an Amazon CloudFront distribution with both ALBs configured as origins and enable origin failover. Update the API endpoint to use the distribution's domain name.

AWS Certified Solutions Architect Professional SAP-C02
Continuous Improvement for Existing Solutions
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