- A
Create an IAM role in the destination account with write permissions and allow CloudTrail in source accounts to assume that role.
Why wrong: CloudTrail does not assume IAM roles; it uses the service principal and bucket policy.
- B
Use a customer-managed KMS key in the destination account and share it with the source accounts.
Why wrong: KMS key policy needs to allow the source accounts, but this does not enable cross-account delivery by itself; the bucket policy is required.
- C
Create an S3 bucket policy in the destination account that allows the CloudTrail service principal to write objects.
The bucket policy must grant s3:PutObject to the CloudTrail service principal from the source accounts.
- D
Configure S3 bucket ACLs to grant write access to the source account IDs.
Why wrong: S3 ACLs are not the preferred method for cross-account access; bucket policy is more flexible and secure.
SCS-C02 Security Logging and Monitoring Practice Question
This SCS-C02 practice question tests your understanding of security logging and monitoring. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 centralize security logs from multiple AWS accounts into a single S3 bucket. The logging accounts (e.g., security, production) each have their own CloudTrail trails. Which configuration is required to allow cross-account log delivery?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Create an S3 bucket policy in the destination account that allows the CloudTrail service principal to write objects.
Option A is correct because CloudTrail can deliver logs to an S3 bucket in another account by using a bucket policy that grants CloudTrail's service principal write access. Option B is wrong because KMS keys are for encryption, not cross-account access. Option C is wrong because S3 ACLs are not recommended for cross-account; bucket policy is used. Option D is wrong because IAM roles are used for other services but CloudTrail uses bucket policies.
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 an IAM role in the destination account with write permissions and allow CloudTrail in source accounts to assume that role.
Why it's wrong here
CloudTrail does not assume IAM roles; it uses the service principal and bucket policy.
- ✗
Use a customer-managed KMS key in the destination account and share it with the source accounts.
Why it's wrong here
KMS key policy needs to allow the source accounts, but this does not enable cross-account delivery by itself; the bucket policy is required.
- ✓
Create an S3 bucket policy in the destination account that allows the CloudTrail service principal to write objects.
Why this is correct
The bucket policy must grant s3:PutObject to the CloudTrail service principal from the source accounts.
Related concept
Static NAT maps one inside address to one outside address.
- ✗
Configure S3 bucket ACLs to grant write access to the source account IDs.
Why it's wrong here
S3 ACLs are not the preferred method for cross-account access; bucket policy is more flexible and secure.
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 SCS-C02 NAT questions on configuration and troubleshooting.
- →
Security Logging and Monitoring — study guide chapter
Learn the concepts, then practise the questions
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FAQ
Questions learners often ask
What does this SCS-C02 question test?
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: Create an S3 bucket policy in the destination account that allows the CloudTrail service principal to write objects. — Option A is correct because CloudTrail can deliver logs to an S3 bucket in another account by using a bucket policy that grants CloudTrail's service principal write access. Option B is wrong because KMS keys are for encryption, not cross-account access. Option C is wrong because S3 ACLs are not recommended for cross-account; bucket policy is used. Option D is wrong because IAM roles are used for other services but CloudTrail uses bucket policies.
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.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
About these practice questions
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Last reviewed: Jun 20, 2026
This SCS-C02 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 SCS-C02 exam.
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