- A
Use AWS PrivateLink to connect VPCs via Network Load Balancers.
Correct. PrivateLink keeps traffic within AWS network and supports encryption via TLS; it is fully managed with low overhead.
- B
Use AWS Transit Gateway with IPsec VPN attachments between VPCs.
Why wrong: Incorrect. Transit Gateway VPN attachments are designed for connecting on-premises networks, not for direct inter-VPC connectivity. AWS does not support creating a VPN attachment between two VPCs via Transit Gateway.
- C
Use VPC peering connections between all VPCs.
Why wrong: Incorrect. VPC peering provides private connectivity but does not encrypt traffic. Data traverses the AWS network unencrypted unless application-level encryption is used.
- D
Use AWS Transit Gateway with VPC attachments and enable multicast.
Why wrong: Incorrect. Transit Gateway multicast is used for multicast traffic and does not provide encryption. It also does not ensure traffic is encrypted in transit.
Encrypted VPC Connectivity Within Same Region: Transit Gateway IPsec VPN Attachments
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. A key principle to apply: aWS PrivateLink. 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 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 AWS PrivateLink to connect VPCs via Network Load Balancers.
AWS PrivateLink allows you to connect VPCs privately using VPC endpoints and Network Load Balancers. Traffic stays within the AWS network and never traverses the public internet. When the application uses TLS/HTTPS, the traffic is encrypted end-to-end. This solution has low operational overhead because PrivateLink is fully managed and requires no VPN tunnels or third-party appliances.
Key principle: AWS PrivateLink
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 this is correct
Correct. PrivateLink keeps traffic within AWS network and supports encryption via TLS; it is fully managed with low overhead.
Clue confirmation
The clue word "never" in the question point toward this answer.
Related concept
AWS PrivateLink
- ✗
Use AWS Transit Gateway with IPsec VPN attachments between VPCs.
- ✗
Use VPC peering connections between all VPCs.
Why it's wrong here
Incorrect. VPC peering provides private connectivity but does not encrypt traffic. Data traverses the AWS network unencrypted unless application-level encryption is used.
- ✗
Use AWS Transit Gateway with VPC attachments and enable multicast.
Why it's wrong here
Incorrect. Transit Gateway multicast is used for multicast traffic and does not provide encryption. It also does not ensure traffic is encrypted in transit.
Common exam traps
Common exam trap: answer the scenario, not the keyword
A common trap is assuming VPC peering provides encryption (it does not) or that Transit Gateway VPN attachments can connect VPCs directly (they are for on-premises connectivity). Privatelink meets both requirements with minimal overhead.
Detailed technical explanation
How to think about this question
Transit Gateway IPsec VPN 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
- AWS PrivateLink
- Encryption in transit
- VPC endpoint
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
AWS PrivateLink
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.
Review aWS PrivateLink, then practise related ANS-C01 questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this ANS-C01 question test?
Network Design — This question tests Network Design — AWS PrivateLink.
What is the correct answer to this question?
The correct answer is: Use AWS PrivateLink to connect VPCs via Network Load Balancers. — AWS PrivateLink allows you to connect VPCs privately using VPC endpoints and Network Load Balancers. Traffic stays within the AWS network and never traverses the public internet. When the application uses TLS/HTTPS, the traffic is encrypted end-to-end. This solution has low operational overhead because PrivateLink is fully managed and requires no VPN tunnels or third-party appliances.
What should I do if I get this ANS-C01 question wrong?
Review aWS PrivateLink, then practise related ANS-C01 questions on the same topic to reinforce the concept.
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?
AWS PrivateLink
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Last reviewed: Jun 24, 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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