SAP-C02 Question 22
Single answerA company has deployed an application across multiple AWS Regions to serve a global customer base. The application is hosted in Amazon ECS using an Amazon VPC in each Region. The company wants to establish secure and low-latency connectivity between the VPCs across Regions for inter-service communication. Which solution should the company implement?
- A
Establish VPC peering connections between the VPCs in all Regions.
- B
Use AWS Transit Gateway with inter-Region peering enabled.
- C
Set up Site-to-Site VPN connections between the VPCs in each Region.
- D
Configure AWS Global Accelerator to route traffic between the Regions.
Show answer and explanation
Correct answer: B
Explanation
AWS Transit Gateway with inter-Region peering is the optimal solution for connecting VPCs across multiple Regions as it simplifies management, provides high performance, and supports secure communication. Other options either do not scale well (VPC peering), introduce unnecessary latency (Site-to-Site VPN), or are not designed for inter-VPC connectivity (AWS Global Accelerator).
- A. Incorrect.
VPC peering is not suitable for this scenario as it becomes complex to manage with multiple Regions and does not scale well for inter-Region connectivity.
- B. Correct.
AWS Transit Gateway with inter-Region peering enabled provides scalable, secure, and low-latency connectivity between VPCs across multiple Regions. It is the recommended solution for this scenario.
- C. Incorrect.
Site-to-Site VPN connections introduce significant latency and are not ideal for low-latency inter-Region communication. Additionally, they are not designed for scalable inter-VPC connectivity.
- D. Incorrect.
AWS Global Accelerator is designed to route end-user traffic to the nearest Region, not for inter-VPC communication. It is not suitable for the stated requirement.