Quick Answer
The answer is Azure Key Vault, as it is the dedicated Azure service for securely storing and managing secrets, keys, and certificates for cloud applications. This service provides centralized, hardware-backed encryption and access control through Azure Active Directory, ensuring that sensitive items like connection strings, API keys, and cryptographic keys are never exposed in code or configuration files. On the AZ-305 exam, this question tests your ability to distinguish between services optimized for different data governance roles; a common trap is choosing Azure App Configuration, which is designed for feature flags and app settings rather than secret storage, or Azure Managed HSM, which is a more specialized, single-tenant hardware security module for customers requiring FIPS 140-2 Level 3 compliance. Remember the memory tip: “Keys, secrets, and certs? Key Vault always works.”
This AZ-305 practice question tests your understanding of design infrastructure solutions. 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.
You are designing a solution to securely store secrets, keys, and certificates for a cloud application. Which Azure service should you use?
Azure App Configuration
Why wrong: Azure App Configuration is for managing application settings, not secrets.
Azure Key Vault
Azure Key Vault is designed for secure storage of secrets, keys, and certificates.
Azure Managed HSM
Why wrong: Managed HSM is for dedicated HSM scenarios, not general secret storage.
Azure Storage
Why wrong: Azure Storage is not designed for secret management and lacks access policies and auditing.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Azure Key Vault
Azure Key Vault is the correct service for securely storing and managing secrets, keys, and certificates. Option A (Azure App Configuration) is wrong because it is optimized for application configuration, not secrets. Option B (Azure Managed HSM) is a hardware security module but is more specialized and not the standard recommendation for general secret storage. Option D (Azure Storage) is incorrect as it lacks native secret management capabilities.
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
For each option: why learners choose it and why it is or isn't the right answer here.
Azure App Configuration
Why it's wrong here
Azure App Configuration is for managing application settings, not secrets.
Azure Key Vault
Why this is correct
Azure Key Vault is designed for secure storage of secrets, keys, and certificates.
Related concept
Static NAT maps one inside address to one outside address.
Azure Managed HSM
Why it's wrong here
Managed HSM is for dedicated HSM scenarios, not general secret storage.
Azure Storage
Why it's wrong here
Azure Storage is not designed for secret management and lacks access policies and auditing.
Common exam traps
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.
Trap categories for this question
Scenario analysis trap
Managed HSM is for dedicated HSM scenarios, not general secret storage.
Detailed technical explanation
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.
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
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
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-305 NAT questions on configuration and troubleshooting.
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FAQ
Design infrastructure solutions — This question tests Design infrastructure solutions — Static NAT maps one inside address to one outside address..
The correct answer is: Azure Key Vault — Azure Key Vault is the correct service for securely storing and managing secrets, keys, and certificates. Option A (Azure App Configuration) is wrong because it is optimized for application configuration, not secrets. Option B (Azure Managed HSM) is a hardware security module but is more specialized and not the standard recommendation for general secret storage. Option D (Azure Storage) is incorrect as it lacks native secret management capabilities.
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-305 NAT questions on configuration and troubleshooting.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 20, 2026
This AZ-305 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-305 exam.
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