- A
Set up a VPC peering connection and configure VPN encryption using a virtual private gateway in each VPC.
Why wrong: Incorrect. VPC peering does not support VPN encryption via virtual private gateways; this configuration is not valid.
- B
Use VPC endpoints to connect the VPCs via AWS PrivateLink.
Correct. AWS PrivateLink provides encrypted private connectivity between VPCs via VPC endpoints, with minimal operational overhead.
- C
Attach both VPCs to an AWS Direct Connect connection.
Why wrong: Incorrect. AWS Direct Connect does not encrypt traffic by default; additional VPN configurations are needed, increasing overhead.
- D
Establish a VPC peering connection between the VPCs.
Why wrong: Incorrect. VPC peering alone does not encrypt traffic; it only provides private routing.
ANS-C01 AWS PrivateLink Practice Question
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. 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 financial services company requires that all traffic between two VPCs in the same region be encrypted in transit. The VPCs are in separate AWS accounts and use non-overlapping CIDR blocks. Which solution meets the requirement with the least operational overhead?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"least"Why it matters: You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.
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 VPC endpoints to connect the VPCs via AWS PrivateLink.
AWS PrivateLink (VPC endpoints) allows you to connect VPCs privately using AWS's internal network. Traffic between VPC endpoints and services is encrypted using TLS/SSL by default, meeting the encryption-in-transit requirement with minimal operational overhead. No additional VPN configurations or third-party appliances are needed, making it the simplest solution.
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.
- ✗
Set up a VPC peering connection and configure VPN encryption using a virtual private gateway in each VPC.
Why it's wrong here
Incorrect. VPC peering does not support VPN encryption via virtual private gateways; this configuration is not valid.
- ✓
Use VPC endpoints to connect the VPCs via AWS PrivateLink.
Why this is correct
Correct. AWS PrivateLink provides encrypted private connectivity between VPCs via VPC endpoints, with minimal operational overhead.
Clue confirmation
The clue word "least" in the question point toward this answer.
Related concept
AWS PrivateLink
- ✗
Attach both VPCs to an AWS Direct Connect connection.
Why it's wrong here
Incorrect. AWS Direct Connect does not encrypt traffic by default; additional VPN configurations are needed, increasing overhead.
- ✗
Establish a VPC peering connection between the VPCs.
Why it's wrong here
Incorrect. VPC peering alone does not encrypt traffic; it only provides private routing.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap is that candidates often overlook that AWS PrivateLink inherently provides encryption via TLS, focusing instead on VPC peering (which does not encrypt) or complex VPN setups. The exam tests understanding that PrivateLink offers both private connectivity and encryption out of the box.
Detailed technical explanation
How to think about this question
The solution uses a VPC peering connection as the underlying transport, then overlays IPsec VPN tunnels between the two virtual private gateways (one in each VPC) to encrypt the traffic. This is effectively a site-to-site VPN over AWS's private network, using IKEv1 or IKEv2 for key exchange and ESP (Encapsulating Security Payload) for encryption, typically with AES-256. In practice, this setup requires careful route table entries to direct traffic through the VPN endpoints, but it avoids the complexity of managing EC2-based VPN appliances or third-party software.
KKey Concepts to Remember
- AWS PrivateLink
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.
Visual reference
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 VPC endpoints to connect the VPCs via AWS PrivateLink. — AWS PrivateLink (VPC endpoints) allows you to connect VPCs privately using AWS's internal network. Traffic between VPC endpoints and services is encrypted using TLS/SSL by default, meeting the encryption-in-transit requirement with minimal operational overhead. No additional VPN configurations or third-party appliances are needed, making it the simplest solution.
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: "least". You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.
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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