The correct answer is to create a backup of the source HSM and restore it to the target HSM in the second region, as CloudHSM does not support native cross-region key synchronization. This method works because CloudHSM clusters are isolated per region, and the only secure way to move key material between them is by using the same backup file, which preserves the key material in an encrypted state tied to your account. On the AWS Certified Security Specialty SCS-C02 exam, this question tests your understanding that CloudHSM lacks automatic replication features, so you must rely on backup and restore for high availability across regions. A common trap is assuming KMS can sync CloudHSM keys or that manual API exports are safe, but both introduce security risks or lack integration. Remember the mnemonic: “Backup and restore, never export or implore” — CloudHSM keys stay locked in hardware, so move the backup, not the key.
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 is using AWS CloudHSM to store encryption keys for a custom application. The application needs high availability across two AWS Regions. What is the MOST secure and cost-effective approach to synchronize key material between the HSMs in each Region?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a backup of the source HSM and restore it to the target HSM in the second region
CloudHSM does not automatically sync key material across clusters. The best practice is to back up the HSM from one Region and restore to the other using the same backup. Option C is correct because backup and restore in the same account provides secure key synchronization. Option A is incorrect because CloudHSM does not support cross-region replication natively. Option B is incorrect because manual key export via API introduces security risks. Option D is incorrect because KMS does not directly integrate with CloudHSM for key sync across regions.
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 AWS KMS multi-Region keys with custom key store backed by CloudHSM
Why it's wrong here
Multi-Region keys in KMS do not directly sync CloudHSM key material.
✓
Create a backup of the source HSM and restore it to the target HSM in the second region
Why this is correct
Backup and restore is the recommended method for cross-region key synchronization.
Related concept
Static NAT maps one inside address to one outside address.
✗
Export the key material from the source HSM using the encrypt/decrypt API and import into the target HSM
Why it's wrong here
Exporting key material outside the HSM violates security best practices.
✗
Use the AWS CloudHSM client to replicate the key material automatically across regions
Why it's wrong here
CloudHSM does not have automatic cross-region replication.
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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
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: Create a backup of the source HSM and restore it to the target HSM in the second region — CloudHSM does not automatically sync key material across clusters. The best practice is to back up the HSM from one Region and restore to the other using the same backup. Option C is correct because backup and restore in the same account provides secure key synchronization. Option A is incorrect because CloudHSM does not support cross-region replication natively. Option B is incorrect because manual key export via API introduces security risks. Option D is incorrect because KMS does not directly integrate with CloudHSM for key sync across regions.
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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