SAA-C03 Question 548
Single answerA company has two VPCs in the same AWS Region: VPC-A and VPC-B. VPC-A hosts a private application, while VPC-B hosts a reporting service that requires access to the private application. The company wants to establish private connectivity between the two VPCs to enable communication. The solution must not require additional routing configurations at the instance level or the use of an internet gateway. Which solution meets these requirements?
- A
Set up a VPC peering connection between VPC-A and VPC-B.
- B
Use an AWS Transit Gateway to connect VPC-A and VPC-B.
- C
Enable an internet gateway for both VPCs and configure security groups to allow traffic.
- D
Create a VPN connection between VPC-A and VPC-B.
Show answer and explanation
Correct answer: A
Explanation
VPC peering is the most suitable solution for establishing private connectivity between two VPCs in the same AWS Region. It allows instances in either VPC to communicate with each other using private IP addresses, without requiring an internet gateway or additional routing configurations at the instance level. Other solutions like Transit Gateway or VPN are either unnecessary for this simple use case or violate the requirement for private connectivity.
- A. Correct.
This is the correct answer. VPC peering creates a direct network connection between two VPCs using private IP addresses, without requiring additional routing at the instance level or an internet gateway.
- B. Incorrect.
While AWS Transit Gateway can connect multiple VPCs, it is more complex and costly compared to VPC peering for a simple two-VPC setup. Additionally, it is not required for this scenario.
- C. Incorrect.
This option is incorrect because using an internet gateway requires traffic to traverse the public internet, which violates the requirement for private connectivity.
- D. Incorrect.
A VPN connection is not necessary for this use case because VPC peering offers a simpler and native solution for private connectivity between two VPCs in the same Region.