The answer is to use SSE-S3 with S3 Cross-Region Replication (CRR). SSE-S3 is the correct encryption choice because it uses AWS-managed keys that are automatically rotated every year, meeting the HIPAA requirement for key management without manual intervention, while CRR handles the disaster recovery need by replicating objects to a second AWS Region. On the AWS Certified Data Engineer Associate DEA-C01 exam, this scenario tests your ability to distinguish between S3 encryption options—SSE-S3, SSE-KMS, and SSE-C—and replication types, with a common trap being to select SSE-KMS (which uses customer-managed keys) or Same-Region Replication (which does not provide cross-region DR). Remember the memory tip: "SSE-S3 for auto-rotated keys, CRR for cross-region DR" to avoid mixing up key management responsibilities and replication scopes.
DEA-C01 Data Store Management Practice Question
This DEA-C01 practice question tests your understanding of data store management. 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 data engineer is designing a data lake on Amazon S3 for a healthcare organization that must comply with HIPAA regulations. The data includes protected health information (PHI) and must be encrypted at rest. The organization requires that all encryption keys be managed by AWS and rotated automatically every year. Additionally, the data must be replicated to another AWS Region for disaster recovery. Which combination of S3 features should the engineer use to meet these requirements?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use SSE-S3 with S3 Cross-Region Replication (CRR).
Option C is correct because SSE-S3 uses AWS-managed keys that are automatically rotated, and S3 Cross-Region Replication (CRR) replicates objects to another region. Option A is incorrect because SSE-KMS uses customer-managed keys, not AWS-managed keys. Option B is incorrect because S3 Same-Region Replication does not replicate to another region. Option D is incorrect because SSE-C uses customer-provided keys, not AWS-managed.
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.
✗
Use SSE-S3 with S3 Same-Region Replication (SRR).
Why it's wrong here
SRR replicates within the same region, not cross-region.
✓
Use SSE-S3 with S3 Cross-Region Replication (CRR).
Why this is correct
SSE-S3 provides AWS-managed keys with automatic rotation; CRR replicates to another region.
Related concept
Static NAT maps one inside address to one outside address.
✗
Use SSE-KMS with S3 Cross-Region Replication (CRR).
Why it's wrong here
SSE-KMS uses customer-managed keys; requirement is AWS-managed keys.
✗
Use SSE-C with S3 Cross-Region Replication (CRR).
Why it's wrong here
SSE-C requires customer-provided keys, not AWS-managed.
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 DEA-C01 NAT questions on configuration and troubleshooting.
Data Store Management — This question tests Data Store Management — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Use SSE-S3 with S3 Cross-Region Replication (CRR). — Option C is correct because SSE-S3 uses AWS-managed keys that are automatically rotated, and S3 Cross-Region Replication (CRR) replicates objects to another region. Option A is incorrect because SSE-KMS uses customer-managed keys, not AWS-managed keys. Option B is incorrect because S3 Same-Region Replication does not replicate to another region. Option D is incorrect because SSE-C uses customer-provided keys, not AWS-managed.
What should I do if I get this DEA-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 DEA-C01 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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