This ANS-C01 practice question tests your understanding of network design. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 is designing a hybrid network architecture that connects multiple VPCs in different AWS regions to an on-premises data center. The company wants to minimize the number of VPN tunnels and reduce management overhead. Which AWS service should be used to simplify this design?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Transit Gateway provides a central hub that can connect multiple VPCs and on-premises networks via VPN, reducing the number of connections and simplifying management.
B
AWS Direct Connect with multiple virtual interfaces
Why wrong: Direct Connect provides a private connection to AWS but does not automatically connect multiple VPCs; additional routing is needed.
C
AWS VPN CloudHub
Why wrong: VPN CloudHub connects multiple customer gateways, but it does not natively connect VPCs; it is designed for branch offices.
D
VPC peering between each VPC and the on-premises network
Why wrong: VPC peering does not support transitive routing and requires many connections, increasing complexity.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
AWS Transit Gateway with VPN attachments
AWS Transit Gateway with VPN attachments is correct because it acts as a central hub that connects multiple VPCs across different AWS regions and an on-premises data center through a single VPN connection. This minimizes the number of VPN tunnels by eliminating the need for individual VPN connections between each VPC and the on-premises network, and reduces management overhead through a single point of configuration and routing.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
AWS Transit Gateway with VPN attachments
Why this is correct
Transit Gateway provides a central hub that can connect multiple VPCs and on-premises networks via VPN, reducing the number of connections and simplifying management.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
AWS Direct Connect with multiple virtual interfaces
Why it's wrong here
Direct Connect provides a private connection to AWS but does not automatically connect multiple VPCs; additional routing is needed.
✗
AWS VPN CloudHub
Why it's wrong here
VPN CloudHub connects multiple customer gateways, but it does not natively connect VPCs; it is designed for branch offices.
✗
VPC peering between each VPC and the on-premises network
Why it's wrong here
VPC peering does not support transitive routing and requires many connections, increasing complexity.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse VPC peering as a viable option for on-premises connectivity, not realizing that VPC peering only works between VPCs and cannot extend to an on-premises network, leading them to overlook the centralized hub-and-spoke model of Transit Gateway.
Detailed technical explanation
How to think about this question
Under the hood, AWS Transit Gateway uses a centralized routing table to manage traffic between all attached VPCs and VPN connections, supporting inter-region peering for global connectivity. In a real-world scenario, a company with VPCs in us-east-1 and eu-west-1 can attach both to a single Transit Gateway, then use a single Site-to-Site VPN attachment to the on-premises network, with BGP dynamic routing (RFC 4271) automatically propagating routes and reducing manual configuration.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Network Design — This question tests Network Design — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: AWS Transit Gateway with VPN attachments — AWS Transit Gateway with VPN attachments is correct because it acts as a central hub that connects multiple VPCs across different AWS regions and an on-premises data center through a single VPN connection. This minimizes the number of VPN tunnels by eliminating the need for individual VPN connections between each VPC and the on-premises network, and reduces management overhead through a single point of configuration and routing.
What should I do if I get this ANS-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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