SAA-C03 Question 546
Single answerA company has multiple VPCs in the same AWS Region. The VPCs are used by different departments, and they need to communicate with each other. The company wants to minimize management overhead while ensuring scalability and the ability to connect additional VPCs in the future. Which solution should the company implement?
- A
Set up VPC peering connections between all VPCs.
- B
Use AWS Transit Gateway to connect the VPCs.
- C
Establish a shared NAT Gateway in one VPC and route all traffic through it.
- D
Create a VPN connection between the VPCs.
Show answer and explanation
Correct answer: B
Explanation
The best solution for connecting multiple VPCs in a scalable and manageable manner is AWS Transit Gateway. It provides a centralized hub for VPC-to-VPC communication, reducing the management overhead associated with VPC peering and supporting straightforward integration for additional VPCs in the future.
- A. Incorrect.
While VPC peering allows direct connectivity between VPCs, it requires individual peering connections to be set up between each pair of VPCs. This approach does not scale well as the number of VPCs increases.
- B. Correct.
AWS Transit Gateway is a scalable and centralized service that simplifies the process of connecting multiple VPCs. It allows for easier management and can scale to accommodate additional VPCs in the future.
- C. Incorrect.
A shared NAT Gateway is used for outbound internet access, not for VPC-to-VPC communication. This option is not suitable for connecting multiple VPCs.
- D. Incorrect.
A VPN connection between VPCs is not a native AWS solution for VPC-to-VPC connectivity and would require more complexity in setup and management.