This ANS-C01 practice question tests your understanding of network design. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company has multiple VPCs across different AWS Regions and wants to enable communication between them using AWS's global network backbone. Which solution meets these requirements with minimal operational overhead?
Use AWS Transit Gateway with inter-Region peering.
Simplifies connectivity across Regions.
Set up AWS Direct Connect connections to each VPC.
Why wrong: Direct Connect is not for VPC-to-VPC.
Create VPC peering connections between each pair of VPCs.
Why wrong: Complex and not scalable.
Use AWS Site-to-Site VPN between VPCs.
Why wrong: VPN is not optimal for inter-Region.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Use AWS Transit Gateway with inter-Region peering.
AWS Transit Gateway with inter-Region peering is correct because it allows you to connect multiple VPCs across different AWS Regions using AWS's global network backbone, providing a hub-and-spoke architecture that scales easily. This solution minimizes operational overhead by centralizing routing and eliminating the need to manage individual connections between each VPC, as Transit Gateway automatically handles route propagation and traffic distribution across peered transit gateways.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Use AWS Transit Gateway with inter-Region peering.
Why this is correct
Simplifies connectivity across Regions.
Related concept
Read the scenario before looking for a memorised answer.
Set up AWS Direct Connect connections to each VPC.
Why it's wrong here
Direct Connect is not for VPC-to-VPC.
Create VPC peering connections between each pair of VPCs.
Why it's wrong here
Complex and not scalable.
Use AWS Site-to-Site VPN between VPCs.
Why it's wrong here
VPN is not optimal for inter-Region.
Common exam traps
AWS often tests the misconception that VPC peering is the simplest solution for multi-VPC connectivity, but the trap here is that VPC peering lacks transitive routing and requires a full mesh for more than two VPCs, making it operationally heavy for multi-region setups, whereas Transit Gateway with inter-Region peering provides a scalable, centrally managed alternative.
Detailed technical explanation
Transit Gateway inter-Region peering uses the AWS global network backbone to route traffic between regions, automatically encrypting traffic at the physical layer without requiring VPN tunnels or additional encryption overhead. Under the hood, each Transit Gateway maintains a route table that can be shared across peered transit gateways, allowing you to propagate routes from attached VPCs and VPN connections, and you can control traffic flow using route tables and AWS Resource Access Manager for cross-account scenarios. In a real-world multi-region deployment, this enables seamless disaster recovery and global application distribution while keeping operational complexity low, as you only manage a single peering attachment per region pair rather than dozens of VPC peering connections.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
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FAQ
Network Design — This question tests Network Design — Read the scenario before looking for a memorised answer..
The correct answer is: Use AWS Transit Gateway with inter-Region peering. — AWS Transit Gateway with inter-Region peering is correct because it allows you to connect multiple VPCs across different AWS Regions using AWS's global network backbone, providing a hub-and-spoke architecture that scales easily. This solution minimizes operational overhead by centralizing routing and eliminating the need to manage individual connections between each VPC, as Transit Gateway automatically handles route propagation and traffic distribution across peered transit gateways.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 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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