SAA-C03 Question #507: Real Exam Question with Answer & Explanation

Question

A company runs an enterprise resource planning (ERP) system on Amazon EC2 instances in a single AWS Region. Users connect to the ERP system by using a public API that is hosted on the EC2 instances. International users report slow API response times from their data centers. A solutions architect needs to improve API response times for the international users. Which solution will meet these requirements MOST cost-effectively?

Options

• ASet up an AWS Direct Connect connection that has a public virtual interface (VIF) to connect
• BDeploy Amazon API Gateway endpoints in multiple Regions. Use Amazon Route 53 latency-
• CSet up AWS Global Accelerator. Configure listeners for the necessary ports. Configure endpoint
• DUse AWS Site-to-Site VPN to establish dedicated VPN tunnels between multiple Regions and

Explanation

AWS Global Accelerator improves the performance and availability of applications by directing user traffic through the AWS global network of edge locations using anycast IP addresses. It reduces latency and jitter for global users accessing applications in a single Region. Global Accelerator routes user requests to the nearest AWS edge location using AWS's high- performance backbone network. It then forwards traffic to the optimal endpoint - in this case, the public API hosted on EC2. This is much more cost-effective and requires less operational complexity than deploying and maintaining multiple API Gateway endpoints across regions (Option B), or setting up Direct Connect links for every international location (Option A). Option C requires no application change and is designed specifically for latency improvement and high availability.

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