DVA-C02 Development with AWS Services Practice Question
This DVA-C02 practice question tests your understanding of development with aws services. 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 developer is deploying a microservices application using Amazon ECS with Fargate. The application consists of multiple services that need to communicate with each other over HTTP. The developer wants to ensure that service-to-service communication is encrypted in transit and that the services can discover each other by logical service names instead of IP addresses. Which combination of AWS services should the developer use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
AWS App Mesh with AWS Cloud Map
AWS App Mesh provides service mesh capabilities including mTLS for encryption and service discovery using virtual services. AWS Cloud Map is used for service discovery with logical names. Together, they enable encrypted service-to-service communication. Route 53 is for DNS but not mTLS. ELB is for load balancing, not service discovery. Systems Manager is for configuration management, not networking. Direct Connect is a dedicated network connection.
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.
✗
Elastic Load Balancing with AWS Systems Manager
Why it's wrong here
ELB provides load balancing but not service discovery or mTLS; Systems Manager is not for networking.
✗
Amazon Route 53 with AWS Direct Connect
Why it's wrong here
Route 53 provides DNS but not mTLS; Direct Connect is a physical connection, not for service discovery.
✗
AWS Lambda with Amazon API Gateway
Why it's wrong here
Lambda and API Gateway are for serverless APIs, not for service mesh or service discovery in ECS.
✓
AWS App Mesh with AWS Cloud Map
Why this is correct
App Mesh provides mTLS and Cloud Map provides service discovery, meeting both requirements.
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 DVA-C02 NAT questions on configuration and troubleshooting.
Development with AWS Services — This question tests Development with AWS Services — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: AWS App Mesh with AWS Cloud Map — AWS App Mesh provides service mesh capabilities including mTLS for encryption and service discovery using virtual services. AWS Cloud Map is used for service discovery with logical names. Together, they enable encrypted service-to-service communication. Route 53 is for DNS but not mTLS. ELB is for load balancing, not service discovery. Systems Manager is for configuration management, not networking. Direct Connect is a dedicated network connection.
What should I do if I get this DVA-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 DVA-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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