AZ-305 Design infrastructure solutions Practice Question
This AZ-305 practice question tests your understanding of design infrastructure solutions. 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.
Which THREE of the following are valid methods to secure access to Azure Storage accounts? (Choose three.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Generate Shared Access Signatures (SAS) with limited permissions and expiry
Options A, B, and D are valid security methods. Option A (Azure AD RBAC) allows fine-grained access control. Option B (Shared Access Signatures) provide delegated access. Option D (Firewall and virtual network service endpoints) restrict network access. Option C is incorrect because access keys provide full access and are not a security best practice. Option E is incorrect; Azure Front Door does not provide storage access control.
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.
✓
Generate Shared Access Signatures (SAS) with limited permissions and expiry
Why this is correct
SAS tokens allow time-limited, permission-restricted access.
Related concept
Static NAT maps one inside address to one outside address.
✓
Configure firewall rules and virtual network service endpoints
Why this is correct
Network rules restrict access to specific IP addresses or virtual networks.
Related concept
Static NAT maps one inside address to one outside address.
✗
Enable Azure Front Door to authenticate requests
Why it's wrong here
Azure Front Door is a global load balancer, not an authentication mechanism for storage.
✓
Use Azure AD RBAC to assign roles to users and applications
Why this is correct
Azure AD RBAC provides granular access control to storage resources.
Related concept
Static NAT maps one inside address to one outside address.
✗
Use storage account access keys for authentication
Why it's wrong here
Access keys grant full control and are not recommended for fine-grained security.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-305 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-305 NAT questions on configuration and troubleshooting.
Design infrastructure solutions — This question tests Design infrastructure solutions — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Generate Shared Access Signatures (SAS) with limited permissions and expiry — Options A, B, and D are valid security methods. Option A (Azure AD RBAC) allows fine-grained access control. Option B (Shared Access Signatures) provide delegated access. Option D (Firewall and virtual network service endpoints) restrict network access. Option C is incorrect because access keys provide full access and are not a security best practice. Option E is incorrect; Azure Front Door does not provide storage access control.
What should I do if I get this AZ-305 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-305 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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