The correct approach is to use a Direct Connect public virtual interface (VIF) to route cross-region S3 traffic, ensuring it stays on the AWS network. This works because a public VIF provides direct access to AWS public services—including S3 in any region—over the AWS global backbone, bypassing the public internet entirely. In contrast, a VPC Gateway Endpoint for S3 is regional only, so traffic to a bucket in another region would leave the AWS network and traverse the internet. On the ANS-C01 exam, this question tests your understanding of how Direct Connect integrates with AWS services for hybrid networking, and a common trap is assuming a Gateway Endpoint works cross-region. Remember: Gateway Endpoints are region-locked; for cross-region S3 access, always think public VIF or Direct Connect Gateway. A simple memory tip: “Gateway is local, public VIF is global.”
ANS-C01 Network Security, Compliance and Governance Practice Question
This ANS-C01 practice question tests your understanding of network security, compliance and governance. 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 has an AWS Direct Connect connection and wants to ensure that all traffic from its VPC to an S3 bucket in another region stays within the AWS network. How should this be accomplished?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use a NAT gateway in the VPC and route traffic through the Direct Connect public VIF
Option A is correct because a VPC Gateway Endpoint for S3 is regional and allows traffic to stay within the AWS network only within the same region. For cross-region access, using a Gateway Endpoint in the source region combined with a Direct Connect connection does not keep traffic on the AWS network; it goes over the public internet. The correct approach is to use a VPC Gateway Endpoint in the source region to access S3 in the same region, but for cross-region, you must use a Direct Connect Virtual Interface (public VIF) or a Direct Connect Gateway to route traffic via AWS backbone. Option B is wrong because a VPC interface endpoint for S3 is not supported. Option C is wrong because a NAT gateway would route traffic over the internet. Option D is wrong because a VPN does not keep traffic on the AWS backbone for cross-region S3 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
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Create a VPC Gateway Endpoint for S3 in the source VPC
Why it's wrong here
Gateway Endpoints are regional and only work within the same region.
✗
Create a VPC Interface Endpoint for S3 in the source VPC
Why it's wrong here
S3 does not support Interface Endpoints.
✓
Use a NAT gateway in the VPC and route traffic through the Direct Connect public VIF
Why this is correct
Using a public VIF with Direct Connect allows traffic to S3 in any region via the AWS backbone, keeping it off the public internet.
Related concept
Static NAT maps one inside address to one outside address.
✗
Establish a VPN connection to the S3 bucket
Why it's wrong here
VPN over internet does not guarantee traffic stays on AWS network.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
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
How to think about this question
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.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
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
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
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.
Network Security, Compliance and Governance — This question tests Network Security, Compliance and Governance — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Use a NAT gateway in the VPC and route traffic through the Direct Connect public VIF — Option A is correct because a VPC Gateway Endpoint for S3 is regional and allows traffic to stay within the AWS network only within the same region. For cross-region access, using a Gateway Endpoint in the source region combined with a Direct Connect connection does not keep traffic on the AWS network; it goes over the public internet. The correct approach is to use a VPC Gateway Endpoint in the source region to access S3 in the same region, but for cross-region, you must use a Direct Connect Virtual Interface (public VIF) or a Direct Connect Gateway to route traffic via AWS backbone. Option B is wrong because a VPC interface endpoint for S3 is not supported. Option C is wrong because a NAT gateway would route traffic over the internet. Option D is wrong because a VPN does not keep traffic on the AWS backbone for cross-region S3 access.
What should I do if I get this ANS-C01 question wrong?
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.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
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
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.