The answer is to enable default encryption and server access logging on the S3 destination bucket. Default encryption, using either SSE-S3 or SSE-KMS, ensures that all CloudTrail log files are automatically encrypted at rest the moment they are written, meeting the requirement for encryption without any manual intervention. Server access logging then creates a separate log of every request made to the bucket, including who accessed the logs and from where, effectively logging access to the logs themselves. On the AWS Certified Security Specialty SCS-C02 exam, this pairing tests your understanding that encryption and auditing are distinct controls—a common trap is confusing MFA Delete or Object Lock (which protect against deletion) with encryption, or picking Transfer Acceleration (a performance feature). Remember the memory tip: “Encrypt with default, audit with server logs” to keep these two complementary S3 features straight.
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.
A company uses AWS CloudTrail and wants to ensure that log files are encrypted at rest and that access to the logs is logged. Which combination of S3 features should be enabled on the destination bucket?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Default encryption and server access logging
Option A is correct because enabling default encryption (SSE-S3 or SSE-KMS) encrypts logs at rest, and enabling server access logs on the bucket logs access to the bucket. Option B is wrong because MFA Delete is for deletion protection, not encryption. Option C is wrong because S3 Object Lock prevents deletion but does not encrypt. Option D is wrong because S3 Transfer Acceleration is for faster uploads, not security.
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.
✗
S3 Transfer Acceleration and default encryption
Why it's wrong here
Transfer Acceleration is for speed, not security.
✗
MFA Delete and versioning
Why it's wrong here
MFA Delete protects against deletion but does not encrypt.
✓
Default encryption and server access logging
Why this is correct
Default encryption provides encryption at rest; server access logs log access requests.
Related concept
Static NAT maps one inside address to one outside address.
✗
S3 Object Lock and versioning
Why it's wrong here
Object Lock prevents deletion but does not encrypt.
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 — 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: Default encryption and server access logging — Option A is correct because enabling default encryption (SSE-S3 or SSE-KMS) encrypts logs at rest, and enabling server access logs on the bucket logs access to the bucket. Option B is wrong because MFA Delete is for deletion protection, not encryption. Option C is wrong because S3 Object Lock prevents deletion but does not encrypt. Option D is wrong because S3 Transfer Acceleration is for faster uploads, not security.
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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