This AZ-204 practice question tests your understanding of implement azure security. 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 building a microservices application on Azure Container Instances. Each microservice needs to authenticate to Azure Key Vault to retrieve secrets. They want to avoid storing any credentials in the container images or environment variables. What should they do?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable managed identity for the container group and grant it access to Key Vault.
Option B is correct because managed identity for Azure Container Instances allows containers to authenticate to Azure services without credentials. Option A is wrong because passing connection strings as environment variables exposes secrets. Option C is wrong because Docker secrets are not natively supported in Azure Container Instances. Option D is wrong because SAS tokens are not suitable for container-to-Key Vault authentication.
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 Docker secrets mounted as volumes.
Why it's wrong here
Docker secrets are not supported in Azure Container Instances.
✓
Enable managed identity for the container group and grant it access to Key Vault.
Why this is correct
Managed identity allows secure authentication without credentials.
Related concept
Static NAT maps one inside address to one outside address.
✗
Use a shared access signature (SAS) token to access Key Vault.
Why it's wrong here
SAS tokens are for storage, not Key Vault.
✗
Store the Key Vault URI and a client secret in environment variables.
Why it's wrong here
Environment variables can be viewed, and a client secret is a credential.
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 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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-204 question in full detail.
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 AZ-204 NAT questions on configuration and troubleshooting.
Implement Azure security — This question tests Implement Azure security — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Enable managed identity for the container group and grant it access to Key Vault. — Option B is correct because managed identity for Azure Container Instances allows containers to authenticate to Azure services without credentials. Option A is wrong because passing connection strings as environment variables exposes secrets. Option C is wrong because Docker secrets are not natively supported in Azure Container Instances. Option D is wrong because SAS tokens are not suitable for container-to-Key Vault authentication.
What should I do if I get this AZ-204 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 AZ-204 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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