AWS Certified Solutions Architect Professional SAP-C02 Practice Question

The correct answer is to use AWS Global Accelerator. This service is specifically designed to improve the performance and availability of global applications by routing user traffic over the highly available and congestion-free AWS global network. It provides static anycast IP addresses that act as a fixed entry point, and it directs traffic to the optimal endpoint based on health, client location, and configured policies. Critically for this scenario, Global Accelerator supports client affinity, which ensures that requests from a specific user are consistently routed to the same endpoint to maintain session state.

Incorrect Answers:

• Amazon CloudFront: While CloudFront is excellent for delivering static and dynamic web content with low latency by caching it at edge locations, it is primarily a content delivery network (CDN). For stateful applications requiring optimized network paths and session affinity for non-cacheable dynamic content, Global Accelerator is the more suitable primary solution because it focuses on optimizing the network path itself rather than just caching.
• Amazon Route 53 with latency-based routing: This solution operates at the DNS level, directing users to the region with the lowest latency at the time of the DNS query. However, it does not improve the performance of the actual data path over the public internet. Global Accelerator, in contrast, ingresses traffic onto the AWS global network at the nearest edge location, providing a more reliable and performant path from the user to the application.
• AWS Transit Gateway with inter-region peering: Transit Gateway is a network transit hub used to interconnect VPCs and on-premises networks. It is a solution for simplifying backend network topology and does not address the performance of traffic between end-users on the internet and the application endpoints.