The answer is that no additional action is required, as DynamoDB global tables automatically encrypt all replication traffic in transit between regions. This is because global tables leverage the AWS global backbone network, and all inter-region data replication is secured using Transport Layer Security (TLS) by default, with no need for manual configuration like VPC peering or internet gateways. On the AWS Certified Database Specialty DBS-C01 exam, this concept tests your understanding of DynamoDB’s built-in security features versus common misconceptions about adding network layers. A frequent trap is assuming you must set up a VPC peering connection or CloudFront to encrypt replication, but the service handles encryption in transit natively. Memory tip: Think “global by default, encrypted by design”—DynamoDB global tables come with TLS already wrapped around every cross-region move.
DBS-C01 Database Security Practice Question
This DBS-C01 practice question tests your understanding of database security. 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 is using an Amazon DynamoDB table with a global table configuration across two AWS regions. The security team wants to ensure that all data is encrypted in transit between the regions. What should the team do?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
No additional action is required; DynamoDB global tables encrypt all replication traffic in transit by default.
Option B is correct. Global tables for DynamoDB use AWS global infrastructure to replicate data across regions. All replication traffic is automatically encrypted in transit using TLS. No additional configuration is needed. Option A is incorrect because a VPC peering connection is not required; DynamoDB global tables work over the AWS backbone. Option C is incorrect because an Internet gateway is not used for inter-region replication. Option D is incorrect because CloudFront does not encrypt DynamoDB replication traffic.
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.
✗
Configure an Internet gateway in each region and enforce HTTPS for all traffic.
Why it's wrong here
Internet gateway is for internet traffic, not required for global tables.
✗
Use AWS CloudFront to route traffic between the regions with SSL/TLS termination.
Why it's wrong here
CloudFront is a CDN, not used for DynamoDB replication.
✗
Set up a VPC peering connection between the two regions and route DynamoDB traffic through it.
Why it's wrong here
DynamoDB global tables do not require VPC peering.
✓
No additional action is required; DynamoDB global tables encrypt all replication traffic in transit by default.
Why this is correct
Replication traffic between regions is automatically encrypted.
Related concept
Static NAT maps one inside address to one outside address.
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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
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 DBS-C01 NAT questions on configuration and troubleshooting.
Database Security — This question tests Database Security — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: No additional action is required; DynamoDB global tables encrypt all replication traffic in transit by default. — Option B is correct. Global tables for DynamoDB use AWS global infrastructure to replicate data across regions. All replication traffic is automatically encrypted in transit using TLS. No additional configuration is needed. Option A is incorrect because a VPC peering connection is not required; DynamoDB global tables work over the AWS backbone. Option C is incorrect because an Internet gateway is not used for inter-region replication. Option D is incorrect because CloudFront does not encrypt DynamoDB replication traffic.
What should I do if I get this DBS-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 DBS-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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