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 wants to restrict access to an S3 bucket so that only requests from a specific VPC are allowed. Which policy should they use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Add a bucket policy with a condition that requires aws:SourceVpc to be the VPC ID.
Option D is correct because S3 bucket policies can use aws:SourceVpc condition key to restrict access to a specific VPC. Option A is wrong because security groups are not used for S3. Option B is wrong because VPC Endpoint policies control actions but not source VPC. Option C is wrong because IAM policies are attached to users/roles, not to the bucket.
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.
✗
Create an IAM policy that restricts access to the VPC and attach it to all users.
Why it's wrong here
IAM policies cannot restrict based on VPC; they can use source IP but not VPC.
✗
Attach a security group to the S3 bucket that allows traffic from the VPC.
Why it's wrong here
Security groups cannot be attached to S3 buckets; they are used for EC2 instances and ENIs.
✓
Add a bucket policy with a condition that requires aws:SourceVpc to be the VPC ID.
Why this is correct
This condition ensures requests originate from the specified VPC.
Related concept
Read the scenario before looking for a memorised answer.
✗
Create a VPC Endpoint policy that allows access only from the VPC.
Why it's wrong here
VPC Endpoint policies control what actions can be performed via the endpoint, not which source VPC can access the bucket.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 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.
Identify which ANS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Network Security, Compliance and Governance — This question tests Network Security, Compliance and Governance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Add a bucket policy with a condition that requires aws:SourceVpc to be the VPC ID. — Option D is correct because S3 bucket policies can use aws:SourceVpc condition key to restrict access to a specific VPC. Option A is wrong because security groups are not used for S3. Option B is wrong because VPC Endpoint policies control actions but not source VPC. Option C is wrong because IAM policies are attached to users/roles, not to the bucket.
What should I do if I get this ANS-C01 question wrong?
Identify which ANS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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