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Amazon ANS-C01 Exam - Topic 4 Question 62 Discussion
Topic #: 4
A company runs applications in two VPCs that are in separate AWS Regions. One VPC is in the us-east-1 Region. The second VPC is in the us-west-1 Region. The company needs to establish connectivity between the two VPCs. The company also needs to connect the VPCs to applications that run in an on-premises data center.
The current traffic requirement between the VPCs is 50 per month. The company expects traffic volume between the VPCs to increase. The traffic requirement from the VPCs to the on-premises data center is 10 per month. The company expects the traffic between the VPCs and the data center to remain constant.
Which solution will meet these requirements MOST cost-effectively?
Traffic Volume Consideration: The traffic volume between the VPCs (50 TB per month and increasing) justifies the use of transit gateways, which are designed for scalable, high-throughput interconnectivity. A VPC peering connection would not scale as efficiently for this traffic volume.
On-Premises Connectivity: Establishing VPN connections from the on-premises firewall to the transit gateways ensures secure connectivity between the on-premises data center and both VPCs.
Transit Gateway Peering: Creating a peering connection between the transit gateways allows for efficient inter-Region communication between the VPCs without routing through the on-premises data center, reducing latency and costs.
Cost Efficiency: Transit gateway peering provides a cost-effective solution for large inter-Region traffic volumes compared to alternatives like routing all traffic through the on-premises data center, which would incur higher egress costs and potentially create a bottleneck.
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