SAA-C03 Question 545
Single answerA company is running multi-tier applications across multiple VPCs in different AWS Regions. They want to streamline communication between these VPCs while ensuring low operational overhead and centralized management. Which solution should the company implement?
- A
Set up VPC peering connections between all the VPCs in each Region and between the Regions.
- B
Deploy an AWS Transit Gateway in each Region and establish inter-region peering between the Transit Gateways.
- C
Use Elastic Load Balancers (ELBs) to route traffic between the VPCs in different Regions.
- D
Configure direct VPN connections between the VPCs in different Regions.
Show answer and explanation
Correct answer: B
Explanation
AWS Transit Gateway allows organizations to simplify and centralize VPC-to-VPC communication across multiple Regions. By deploying a Transit Gateway in each Region and establishing inter-region peering between them, the company achieves scalable, manageable, and cost-effective networking without the need for a complex full mesh of VPC peering connections or VPNs.
- A. Incorrect.
Setting up VPC peering connections would require creating and managing multiple connections for a full mesh topology, which increases operational overhead and lacks centralized management.
- B. Correct.
Using AWS Transit Gateway in each Region and establishing inter-region peering provides centralized routing management, scalability, and simplified network communication between VPCs across Regions.
- C. Incorrect.
Elastic Load Balancers are designed for distributing traffic to targets within a VPC or across Availability Zones, not for routing traffic between VPCs or Regions.
- D. Incorrect.
Direct VPN connections between VPCs are a less scalable and more complex solution compared to Transit Gateway for multi-VPC and multi-region communication.