ANS-C01 Question 391
Single answerYour organization has deployed a multi-region application that uses an Amazon VPC in each region, connected via AWS Transit Gateway. To ensure high availability and optimize network performance, you need to configure routing between the VPCs. Additionally, you must ensure that traffic between the VPCs in different regions does not traverse the public internet. Which feature or configuration should you implement to meet these requirements?
- A
Enable AWS Transit Gateway Inter-Region Peering
- B
Configure VPC Peering between all VPCs in the application
- C
Use AWS Direct Connect for inter-region communication
- D
Set up an Elastic Load Balancer in each region to route traffic between VPCs
Show answer and explanation
Correct answer: A
Explanation
To achieve high availability and ensure inter-region traffic does not traverse the public internet, AWS Transit Gateway Inter-Region Peering is the correct solution. It enables private, scalable, and high-performance connectivity between VPCs across regions through the AWS global backbone, eliminating the need for public internet routing.
- A. Correct.
AWS Transit Gateway Inter-Region Peering allows you to connect Transit Gateways across AWS regions using the AWS private global backbone, ensuring high availability and that traffic does not traverse the public internet.
- B. Incorrect.
VPC Peering does not scale well for large and complex multi-region architectures because it requires a full mesh of connections and does not use the AWS private global backbone for inter-region traffic.
- C. Incorrect.
AWS Direct Connect is used to establish private connections between on-premises environments and AWS, but it is not used for communication between VPCs across regions.
- D. Incorrect.
Elastic Load Balancers are used for distributing traffic across targets within a single or multiple availability zones. They cannot route traffic between VPCs in different regions.