Question 1,474 of 1,621
ANS-C01 Network Implementation Practice Question
A company is deploying a multi-region application using two AWS Regions. They want to use an AWS Transit Gateway to interconnect VPCs within each region, and they need to interconnect the Transit Gateways across regions. Which is the most scalable and reliable approach?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Transit Gateway peering attachments between the Transit Gateways in each region.
AWS Transit Gateway supports inter-region peering, which is the recommended method for connecting Transit Gateways across regions. Option A is correct. Option B is incorrect because VPC peering does not natively interconnect Transit Gateways. Option C is incorrect because using AWS Site-to-Site VPN connections adds complexity, reduces bandwidth, and is less reliable compared to Transit Gateway peering. Option D is incorrect because a Direct Connect gateway is designed for connecting on-premises networks to AWS, not for interconnecting Transit Gateways across regions.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Use Transit Gateway peering attachments between the Transit Gateways in each region.
Why this is correct
Transit Gateway peering is the native, scalable, and reliable method to interconnect Transit Gateways across regions.
- ✗
Create a VPC peering connection between VPCs in different regions and attach them to the Transit Gateways.
Why it's wrong here
VPC peering is one-to-one and does not integrate with Transit Gateway natively; this would complicate routing.
- ✗
Use AWS Site-to-Site VPN connections between the Transit Gateways in each region.
Why it's wrong here
VPN connections can work but have lower throughput, higher latency, and less reliability than Transit Gateway peering.
- ✗
Set up a Direct Connect gateway with virtual interfaces in each region and propagate routes.
Why it's wrong here
Direct Connect gateway is for connecting on-premises to multiple VPCs, not for interconnecting Transit Gateways across regions.
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Last reviewed: Jun 20, 2026
This ANS-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the ANS-C01 exam.
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