The correct answer is to enable CloudTrail log file SSE-KMS encryption and enable CloudTrail log file integrity validation. SSE-KMS ensures logs are encrypted at rest using a customer-managed KMS key, providing granular control over encryption and key rotation, while integrity validation uses a SHA-256 hash chain to detect any tampering with log files after they are delivered to S3. On the AWS Certified Security Specialty SCS-C02 exam, this pairing tests your understanding that CloudTrail’s native features—not external services like CloudWatch Logs or CloudHSM—are the direct solution for both encryption and tamper detection. A common trap is assuming CloudWatch Logs can validate integrity, but it only stores logs; integrity validation must be enabled separately within CloudTrail. Memory tip: think “KMS for keys, hash for peace”—the hash chain proves no one has altered the logs.
SCS-C02 Data Protection Practice Question
This SCS-C02 practice question tests your understanding of data protection. 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 uses AWS CloudTrail to log API activity. The security team wants to ensure that log files are encrypted at rest and that any tampering with logs is detectable. Which combination of services should be used?
Option C is correct because CloudTrail can be configured to use SSE-KMS for encryption, and log file integrity validation provides tamper detection. Option A is wrong because CloudWatch Logs does not provide integrity validation. Option B is wrong because S3 server access logs are not for CloudTrail. Option D is wrong because CloudHSM does not integrate directly with CloudTrail.
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.
✗
Enable CloudTrail and configure S3 bucket to use default encryption and enable S3 server access logs.
Why it's wrong here
Server access logs do not validate CloudTrail log integrity.
Static NAT maps one inside address to one outside address.
✗
Use AWS CloudHSM to generate keys and encrypt CloudTrail logs at the application layer.
Why it's wrong here
CloudHSM is not integrated with CloudTrail for automatic encryption.
✗
Enable CloudTrail log file encryption using SSE-S3 and store logs in CloudWatch Logs.
Why it's wrong here
CloudWatch Logs does not provide integrity validation.
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.
Data Protection — This question tests Data Protection — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Enable CloudTrail log file SSE-KMS encryption and enable CloudTrail log file integrity validation. — Option C is correct because CloudTrail can be configured to use SSE-KMS for encryption, and log file integrity validation provides tamper detection. Option A is wrong because CloudWatch Logs does not provide integrity validation. Option B is wrong because S3 server access logs are not for CloudTrail. Option D is wrong because CloudHSM does not integrate directly with CloudTrail.
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.
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Question Discussion
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