- A
Create a custom RBAC role that allows full access to the storage account and assign it to the web app's service principal.
Why wrong: A custom role is unnecessary; Storage Blob Data Contributor is sufficient, but the service principal must be the managed identity, not a separate registration.
- B
Enable the web app's system-assigned managed identity, assign the Storage Blob Data Contributor role to the identity, and disable anonymous access on the storage account.
Managed identity provides Entra ID authentication and RBAC authorization.
- C
Use storage account access keys and store them in Key Vault, then configure the web app to retrieve them at runtime.
Why wrong: Access keys do not use Entra ID authentication.
- D
Generate a shared access signature (SAS) token with read permissions, store it in App Settings, and configure the web app to use it.
Why wrong: SAS tokens are not tied to managed identity and do not use Entra ID.
Quick Answer
The correct configuration is to enable the web app’s system-assigned managed identity, assign the Storage Blob Data Contributor role to that identity, and disable anonymous access on the storage account. This works because a managed identity provides an automatically managed service principal in Microsoft Entra ID, allowing the App Service to authenticate without storing credentials. By assigning the Storage Blob Data Contributor role, you grant the identity the necessary permissions to read and write blobs, while disabling anonymous access enforces that only authenticated Entra ID requests are accepted. On the AZ-204 exam, this scenario tests your understanding of identity-based access versus key-based or SAS-based methods—a common trap is choosing storage account keys or SAS tokens, which bypass Entra ID and violate the security requirement. Remember the mnemonic “M.I. + Role + No Anonymous” to recall that managed identity, a role assignment, and disabling anonymous access are the three essential steps for secure, identity-only blob access.
AZ-204 Implement Azure security Practice Question
This AZ-204 practice question tests your understanding of implement azure 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 deploys an Azure App Service web app that stores sensitive data in Azure Blob Storage. The security team requires that all access to the blob storage must be authenticated and authorized via Microsoft Entra ID, and that no anonymous access is permitted. The web app must also be able to access the storage using its managed identity. Which configuration should the company implement?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Enable the web app's system-assigned managed identity, assign the Storage Blob Data Contributor role to the identity, and disable anonymous access on the storage account.
Option B is correct because enabling managed identity and assigning the Storage Blob Data Contributor role ensures the web app can access blobs via Entra ID authentication. Disabling anonymous access is a separate step. Option A is wrong because storage account keys bypass Entra ID. Option C is wrong because SAS tokens do not use managed identity. Option D is wrong because shared access policy is not used for managed identity access.
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.
- ✗
Create a custom RBAC role that allows full access to the storage account and assign it to the web app's service principal.
Why it's wrong here
A custom role is unnecessary; Storage Blob Data Contributor is sufficient, but the service principal must be the managed identity, not a separate registration.
- ✓
Enable the web app's system-assigned managed identity, assign the Storage Blob Data Contributor role to the identity, and disable anonymous access on the storage account.
Why this is correct
Managed identity provides Entra ID authentication and RBAC authorization.
Related concept
Static NAT maps one inside address to one outside address.
- ✗
Use storage account access keys and store them in Key Vault, then configure the web app to retrieve them at runtime.
Why it's wrong here
Access keys do not use Entra ID authentication.
- ✗
Generate a shared access signature (SAS) token with read permissions, store it in App Settings, and configure the web app to use it.
Why it's wrong here
SAS tokens are not tied to managed identity and do not use Entra ID.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
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 AZ-204 NAT questions on configuration and troubleshooting.
- →
Implement Azure security — study guide chapter
Learn the concepts, then practise the questions
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Implement Azure security practice questions
Targeted practice on this topic area only
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All AZ-204 questions
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Microsoft Azure Developer Associate AZ-204 study guide
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AZ-204 practice test guide
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FAQ
Questions learners often ask
What does this AZ-204 question test?
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 the web app's system-assigned managed identity, assign the Storage Blob Data Contributor role to the identity, and disable anonymous access on the storage account. — Option B is correct because enabling managed identity and assigning the Storage Blob Data Contributor role ensures the web app can access blobs via Entra ID authentication. Disabling anonymous access is a separate step. Option A is wrong because storage account keys bypass Entra ID. Option C is wrong because SAS tokens do not use managed identity. Option D is wrong because shared access policy is not used for managed identity access.
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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Last reviewed: Jun 20, 2026
This AZ-204 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AZ-204 exam.
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