ANS-C01 Question 1
Single answerYour company operates a multi-region architecture with critical web applications hosted in both the us-east-1 and us-west-2 AWS regions. You need to design a network solution that maintains low-latency communication between the regions, ensures high availability, and provides redundancy. Which solution should you choose?
- A
Set up an AWS Direct Connect connection between the two regions.
- B
Use an AWS Transit Gateway to establish peering between the VPCs in us-east-1 and us-west-2.
- C
Create a VPC peering connection between the VPCs in us-east-1 and us-west-2.
- D
Use an AWS Global Accelerator to route traffic between the regions.
Show answer and explanation
Correct answer: B
Explanation
To enable low-latency, highly available, and redundant communication between VPCs in different AWS regions, AWS Transit Gateway is the best choice. It supports inter-region peering, provides a scalable solution for connecting multiple VPCs, and offers centralized management. Other options, such as Direct Connect, VPC peering, or Global Accelerator, are not suitable for this specific use case.
- A. Incorrect.
This option is incorrect because AWS Direct Connect is designed to provide dedicated private connectivity between on-premises data centers and AWS, not between AWS regions.
- B. Correct.
This is the correct answer. AWS Transit Gateway allows you to establish peering between VPCs across regions, providing high availability and low-latency communication. It also supports routing redundancy for improved fault tolerance.
- C. Incorrect.
While VPC peering can connect two VPCs in different regions, it is limited in terms of scalability and does not natively provide the high availability and centralized management offered by AWS Transit Gateway.
- D. Incorrect.
AWS Global Accelerator is designed to improve the performance and availability of global applications by routing traffic through AWS's global edge network. However, it is not intended for inter-region VPC communication.