The answer is that the logs:CreateLogGroup resource ARN is too restrictive. This is the most likely cause because when a VPC Flow Logs IAM policy specifies a precise log group ARN for the CreateLogGroup action, it prevents the user from creating a log group with any other name or pattern, even if the rest of the policy correctly includes ec2:CreateFlowLogs, logs:PutLogEvents, and iam:PassRole. On the AWS Certified Advanced Networking Specialty ANS-C01 exam, this scenario tests your understanding of how resource-level restrictions in IAM policies can silently block flow log creation, a common trap where candidates focus only on missing permissions rather than overly narrow ARN constraints. The key insight is that the log group ARN must match exactly what the user’s API call specifies, or the policy will deny the action. Memory tip: think “ARN lock” — if the ARN is too tight, the flow log can’t take flight.
ANS-C01 Network Management and Operations Practice Question
This ANS-C01 practice question tests your understanding of network management and operations. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 network engineer created an IAM policy for a user to manage VPC Flow Logs. The user reports they cannot create flow logs and receive an 'AccessDenied' error. What is the MOST likely reason?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The logs:CreateLogGroup resource ARN is too restrictive.
Option D is correct because the policy allows logs:CreateLogGroup only for a specific log group ARN, but the user might be trying to create a log group with a different name pattern. Option A is incorrect because the policy includes ec2:CreateFlowLogs. Option B is incorrect because the policy includes logs:PutLogEvents. Option C is incorrect because the policy includes iam:PassRole for the specific role.
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.
✗
The ec2:CreateFlowLogs action is missing.
Why it's wrong here
The policy includes ec2:CreateFlowLogs.
✓
The logs:CreateLogGroup resource ARN is too restrictive.
Why this is correct
The resource ARN limits log group creation to names starting with '/aws/vpc-flow-logs/', but the user might be using a different name.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
The logs:PutLogEvents action is missing.
Why it's wrong here
The policy includes logs:PutLogEvents.
✗
The iam:PassRole action is missing for the flow logs role.
Why it's wrong here
The policy includes iam:PassRole for the specific role.
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 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
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 Management and Operations — This question tests Network Management and Operations — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: The logs:CreateLogGroup resource ARN is too restrictive. — Option D is correct because the policy allows logs:CreateLogGroup only for a specific log group ARN, but the user might be trying to create a log group with a different name pattern. Option A is incorrect because the policy includes ec2:CreateFlowLogs. Option B is incorrect because the policy includes logs:PutLogEvents. Option C is incorrect because the policy includes iam:PassRole for the specific role.
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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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.