AWS Certified Advanced Networking Specialty Practice Exam

How can you reduce latencies when connecting VPCs in different regions while maintaining a transit VPC architecture?

1. Set up a local transit hub in the Singapore region

2. Establish VPNs between the VPCs

3. Increase instance sizes to improve performance

4. Create additional subnets in each VPC

The correct answer is: Set up a local transit hub in the Singapore region

Setting up a local transit hub in the Singapore region is an effective way to reduce latencies when connecting VPCs in different regions while maintaining a transit VPC architecture. A transit hub acts as a central point for all interconnections, facilitating efficient routing and management of inter-VPC traffic. By establishing a local transit hub close to the regions where your VPCs are deployed, you minimize the distance that data must travel, which directly contributes to lower latencies. This hub can efficiently handle traffic between multiple VPCs across different regions, allowing for optimized routes and reduced travel time for data packets. Other options, such as establishing VPNs between the VPCs, can introduce additional overhead and potential delays due to encryption and the nature of point-to-point connections. Increasing instance sizes may lead to improved processing capabilities, but it doesn't inherently address the latency between the VPCs. Similarly, creating additional subnets in each VPC does not impact the network latency between geographically separated VPCs. Therefore, the creation of a local transit hub strategically reduces latency and maintains efficient inter-VPC communication.