ANS-C01 Question 160
Single answerYour company has deployed a set of web applications across multiple Amazon VPCs in different AWS Regions. You need to ensure seamless, low-latency communication between the VPCs while also minimizing operational overhead. Which approach should you take to achieve this requirement?
- A
Use Transit Gateway and establish peering connections between the VPCs across Regions.
- B
Set up VPC peering between every VPC to establish direct communication paths across Regions.
- C
Deploy AWS PrivateLink endpoints in each VPC and interconnect them for communication.
- D
Use AWS Transit Gateway with inter-Region peering to connect the VPCs.
Show answer and explanation
Correct answer: D
Explanation
AWS Transit Gateway with inter-Region peering is the best solution for connecting multiple VPCs across Regions. It simplifies network management by acting as a hub for communication, eliminating the need for complex peering mesh configurations. Additionally, inter-Region peering with Transit Gateway uses the AWS Global Infrastructure for low-latency and reliable communication.
- A. Incorrect.
Transit Gateway does not support peering connections directly. Instead, it uses inter-Region peering attachments for connectivity across Regions, making this option invalid.
- B. Incorrect.
While VPC peering can work, it becomes operationally complex and does not scale well for multiple VPCs, especially across Regions.
- C. Incorrect.
AWS PrivateLink is primarily designed for connecting services within or across VPCs and is not meant for large-scale VPC-to-VPC communication across Regions.
- D. Correct.
Using AWS Transit Gateway with inter-Region peering provides a scalable, low-latency, and operationally efficient way to connect multiple VPCs across Regions.