SCS-C02 Security Logging and Monitoring Practice Question
This SCS-C02 practice question tests your understanding of security logging and monitoring. 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.
Refer to the exhibit. A security engineer reviews IAM permissions for the 'admin' user. The user is a member of the 'Administrators' group, which has the 'AdministratorAccess' managed policy attached. Additionally, the user has an inline policy named 'AllowSSH'. The engineer wants to ensure that the user can only start SSM sessions on instances with the tag 'SSH: enabled'. However, the user can still start sessions on any instance. 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.
The inline policy does not include 'ec2:DescribeInstances' for the SSM session, so it cannot start sessions.
Why wrong: The inline policy already includes 'ec2:DescribeInstances' and 'ssm:StartSession', so that is not the issue.
B
The condition 'aws:ResourceTag/SSH' should be 'aws:RequestTag/SSH' to check the request tag.
Why wrong: The condition key 'aws:ResourceTag' is correct for checking resource tags.
C
The inline policy uses 'Allow' instead of 'Deny' for instances without the tag, so it does not restrict access.
The inline policy allows SSM StartSession only on tagged instances, but since the group policy allows all actions, the effective permission is still 'Allow' on all instances. To restrict, a 'Deny' statement is needed for instances without the tag.
D
The inline policy 'AllowSSH' is not effective because it is overridden by the group policy 'AdministratorAccess'.
Why wrong: IAM policies are evaluated with an explicit deny override; however, 'AdministratorAccess' allows all actions, so the inline policy's condition is not restrictive because the group policy already allows the action without conditions.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The inline policy uses 'Allow' instead of 'Deny' for instances without the tag, so it does not restrict access.
The group policy 'AdministratorAccess' grants full access, including ssm:StartSession on all resources. The inline policy's Allow with condition is not restrictive; it only adds an additional Allow path. To restrict, a Deny statement must be used to explicitly block instances without the tag.
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 inline policy does not include 'ec2:DescribeInstances' for the SSM session, so it cannot start sessions.
Why it's wrong here
The inline policy already includes 'ec2:DescribeInstances' and 'ssm:StartSession', so that is not the issue.
✗
The condition 'aws:ResourceTag/SSH' should be 'aws:RequestTag/SSH' to check the request tag.
Why it's wrong here
The condition key 'aws:ResourceTag' is correct for checking resource tags.
✓
The inline policy uses 'Allow' instead of 'Deny' for instances without the tag, so it does not restrict access.
Why this is correct
The inline policy allows SSM StartSession only on tagged instances, but since the group policy allows all actions, the effective permission is still 'Allow' on all instances. To restrict, a 'Deny' statement is needed for instances without the tag.
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 inline policy 'AllowSSH' is not effective because it is overridden by the group policy 'AdministratorAccess'.
Why it's wrong here
IAM policies are evaluated with an explicit deny override; however, 'AdministratorAccess' allows all actions, so the inline policy's condition is not restrictive because the group policy already allows the action without conditions.
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 SCS-C02 NAT questions on configuration and troubleshooting.
Security Logging and Monitoring — This question tests Security Logging and Monitoring — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: The inline policy uses 'Allow' instead of 'Deny' for instances without the tag, so it does not restrict access. — The group policy 'AdministratorAccess' grants full access, including ssm:StartSession on all resources. The inline policy's Allow with condition is not restrictive; it only adds an additional Allow path. To restrict, a Deny statement must be used to explicitly block instances without the tag.
What should I do if I get this SCS-C02 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 SCS-C02 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.
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Question Discussion
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