Quick Answer
The answer is VPC peering, as it is the only AWS service among the options that natively supports secure, private connectivity between VPCs in different AWS regions. Inter-region VPC peering uses the AWS global backbone to route traffic between the peered VPCs without requiring public internet, gateways, or VPN connections, and it works across regions by establishing a simple, one-to-one networking relationship. On the AWS Certified Advanced Networking Specialty ANS-C01 exam, this question tests your understanding of when to use VPC peering versus Transit Gateway or Direct Connect; a common trap is assuming Transit Gateway handles inter-region connectivity natively, but it actually requires VPC peering attachments for cross-region traffic. Direct Connect is designed for on-premises links, not inter-region VPC connectivity, and an Internet Gateway only provides outbound internet access. For a quick memory tip: think of VPC peering as the only “direct” regional bridge—if you need two VPCs in different regions to talk privately, peer them directly.
This ANS-C01 practice question tests your understanding of network implementation. 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 wants to securely connect two VPCs in different AWS regions using AWS infrastructure. Which service should be used?
AWS Direct Connect
Why wrong: Direct Connect is for on-premises to AWS.
Internet Gateway
Why wrong: Internet Gateway is for internet access.
VPC peering
VPC peering supports inter-region connections.
AWS Transit Gateway
Why wrong: Transit Gateway does not support inter-region peering directly.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
VPC peering
Option C is correct because VPC peering supports inter-region peering. Option A is wrong because Direct Connect is for on-premises connectivity, not inter-region. Option B is wrong because Transit Gateway currently does not support inter-region peering natively (requires VPC peering). Option D is wrong because Internet Gateway is for internet access.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
AWS Direct Connect
Why it's wrong here
Direct Connect is for on-premises to AWS.
Internet Gateway
Why it's wrong here
Internet Gateway is for internet access.
VPC peering
Why this is correct
VPC peering supports inter-region connections.
Related concept
Static NAT maps one inside address to one outside address.
AWS Transit Gateway
Why it's wrong here
Transit Gateway does not support inter-region peering directly.
Common exam traps
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related ANS-C01 NAT questions on configuration and troubleshooting.
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FAQ
Network Implementation — This question tests Network Implementation — Static NAT maps one inside address to one outside address..
The correct answer is: VPC peering — Option C is correct because VPC peering supports inter-region peering. Option A is wrong because Direct Connect is for on-premises connectivity, not inter-region. Option B is wrong because Transit Gateway currently does not support inter-region peering natively (requires VPC peering). Option D is wrong because Internet Gateway is for internet access.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related ANS-C01 NAT questions on configuration and troubleshooting.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 20, 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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