The correct answer involves three steps: ensuring the Redshift cluster is encrypted so automated snapshots inherit that encryption, configuring the KMS key policy to grant the target account decrypt permissions, and creating a snapshot copy grant for the target account to authorize use of that key. This works because Redshift automatically encrypts snapshots when the source cluster is encrypted, but cross-account sharing requires explicit authorization—the snapshot copy grant acts as a bridge, allowing the destination account to decrypt the shared snapshot using the same KMS key. On the AWS Certified Security Specialty SCS-C02 exam, this scenario tests your understanding of KMS key policies versus grants, a common trap being the assumption that a separate key is needed for the target account. Remember, the same key can be reused if permissions are properly delegated. Memory tip: think “same key, grant access” to avoid overcomplicating cross-account snapshot sharing.
SCS-C02 Data Protection Practice Question
This SCS-C02 practice question tests your understanding of data protection. 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 Amazon Redshift with encryption at rest using AWS KMS. They want to ensure that automated snapshots are encrypted with the same key and that cross-account snapshot sharing is secured. Which THREE steps should be taken?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable encryption on the Redshift cluster at creation time.
Option A is correct because Redshift automatically encrypts snapshots if the cluster is encrypted. Option C is correct because to share snapshots cross-account, the KMS key must allow the target account to decrypt. Option D is correct because Redshift uses a snapshot copy grant to authorize the destination account to use the key. Option B is wrong because separate key is not required; same key can be used if permissions allow. Option E is wrong because AWS Config rule doesn't enforce cross-account sharing 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.
✓
Enable encryption on the Redshift cluster at creation time.
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.
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 encryption on the Redshift cluster at creation time. — Option A is correct because Redshift automatically encrypts snapshots if the cluster is encrypted. Option C is correct because to share snapshots cross-account, the KMS key must allow the target account to decrypt. Option D is correct because Redshift uses a snapshot copy grant to authorize the destination account to use the key. Option B is wrong because separate key is not required; same key can be used if permissions allow. Option E is wrong because AWS Config rule doesn't enforce cross-account sharing 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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