Q65 — AWS SAA-C03 Ch.16

Question 65 of 100 | ← Chapter 16

Q1265. 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 all users.Which solution will meet these requirements MOST cost-effectively?

• A. Set up an AWS Direct Connect connection that has a public virtual interface(VIF) to connect each user's data center to the EC2 instances. Create a Direct Connect gateway for the ERP system API to route user API requests.
• B. Deploy Amazon API Gateway endpoints in multiple Regions. Use Amazon Route 53 latency-based routing to route requests to the nearest endpoint. Configure a VPC peering connection between the Regions to connect to the ERP system.
• C. Set up AWS Global Accelerator. Configure listeners for the necessary ports. Configure endpoint groups for the appropriate Regions to distribute traffic. Create an endpoint in each group for the API. ✓
• D. Use AWS Site-to-Site VPN to establish dedicated VPN tunnels between multiple Regions and user networks. Route traffic to the API through the VPN connections.

Correct Answer: C. Set up AWS Global Accelerator. Configure listeners for the necessary ports. Configure endpoint groups for the appropriate Regions to distribute traffic. Create an endpoint in each group for the API.

Explanation

The most cost-effective solution to improve API response times for international users is Option C: Set up AWS Global Accelerator.Why Option C is the Best Choice:AWS Global Accelerator is specifically designed to improve global application performance by:Reducing latency by routing traffic through AWS's optimized global network backbone.Providing automatic failover to healthy endpoints.Using anycast IP addresses to direct users to the nearest edge location. Being cost-effective compared to other options (no per-API call fees like API Gateway, no expensive Direct Connect setup).Why Other Options Are Less Cost-Effective or Suitable:Option A: AWS Direct Connect (Public VIF)High cost: Direct Connect requires expensive dedicated connections (3,500 + data transfer feesDirect Connect (1 Gbps)36/month per tunnel + data transfer feesConclusionAWS Global Accelerator (Option C) is the most cost-effective and scalable solution for improving API response times for international users. It leverages AWS's global network to minimize latency without the high costs and complexity of other options.Final Answer: C