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 has a multi-VPC architecture with VPCs in the same region. They need to ensure that traffic between VPCs never traverses the public internet and is encrypted in transit. Which solution meets these requirements with the lowest operational overhead?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "never"
Why it matters: Absolute qualifier. True only if the statement has zero exceptions — be cautious of options that seem obvious but break down in edge cases.
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 IPsec VPN attachments between VPCs.
AWS Transit Gateway with IPsecVPN attachments encrypts traffic between VPCs using IPsec tunnels, ensuring data never traverses the public internet. This solution centralizes connectivity and reduces operational overhead compared to managing multiple VPN connections or VPC peering configurations.
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.
✗
Use AWS PrivateLink to connect VPCs via Network Load Balancers.
Why it's wrong here
PrivateLink keeps traffic private but does not encrypt it.
✓
Use AWS Transit Gateway with IPsec VPN attachments between VPCs.
Why this is correct
Transit GatewayVPN attachments provide encrypted IPsec tunnels with low operational overhead.
Clue confirmation
The clue word "never" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use VPC peering connections between all VPCs.
Why it's wrong here
VPC peering does not encrypt traffic.
✗
Use AWS Transit Gateway with VPC attachments and enable multicast.
Why it's wrong here
Multicast does not provide encryption.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume VPC peering is sufficient for encrypted traffic, but it only provides private connectivity without encryption, while Transit Gateway with IPsecVPN attachments is the correct way to meet both requirements with minimal operational overhead.
Detailed technical explanation
How to think about this question
Transit GatewayIPsecVPN attachments use IKEv1 or IKEv2 to establish encrypted tunnels between VPCs, with traffic encapsulated in ESP packets. This approach supports dynamic routing via BGP, allowing automatic failover and load balancing across multiple tunnels, which reduces manual configuration overhead in multi-VPC environments.
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: Use AWS Transit Gateway with IPsec VPN attachments between VPCs. — AWS Transit Gateway with IPsec VPN attachments encrypts traffic between VPCs using IPsec tunnels, ensuring data never traverses the public internet. This solution centralizes connectivity and reduces operational overhead compared to managing multiple VPN connections or VPC peering configurations.
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: "never". Absolute qualifier. True only if the statement has zero exceptions — be cautious of options that seem obvious but break down in edge cases.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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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.
Question Discussion
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