The answer is a combination of rate limiting policies, the validate-json policy, and OAuth 2.0. Rate limiting throttles excessive requests to protect APIs from abuse, while the validate-json policy inspects payloads against a defined schema to reject malformed data before it reaches the backend. OAuth 2.0 secures access by requiring valid tokens from an authorization server, ensuring only authenticated clients can call the API. On the Microsoft Cybersecurity Architect exam, this question tests your ability to distinguish between Azure-native security services and API Management’s built-in policies—a common trap is confusing Azure Firewall or WAF (which operate at the network edge) with the per-API, policy-driven controls inside API Management. Remember: for throttling, validation, and token-based access, you stay within the API Management policy engine. A useful memory tip is “Rate, Validate, Token”—the three pillars of API-level defense.
SC-100 Design security solutions for infrastructure Practice Question
This SC-100 practice question tests your understanding of design security solutions for infrastructure. 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.
You are designing a security solution for Azure API Management. The requirements include: protecting APIs from abuse, throttling requests, and validating JSON payloads. Which combination of features should you use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Rate limiting policies, validate-json policy, and OAuth 2.0
Option D is correct: rate limiting throttles requests, policies validate JSON, and OAuth 2.0 secures access. Option A is wrong because Azure Firewall does not integrate with API Management for payload validation. Option B is wrong because WAF protects at the network edge, not per-API. Option C is wrong because Managed Identity is for authentication, not throttling or validation.
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.
✗
Managed Identities and Azure AD authentication
Why it's wrong here
Provide authentication, not throttling or validation.
✗
Azure Web Application Firewall (WAF) on Application Gateway
Why it's wrong here
Does not provide per-API rate limiting or JSON validation.
✓
Rate limiting policies, validate-json policy, and OAuth 2.0
Static NAT maps one inside address to one outside address.
✗
Azure Firewall and Network Security Groups
Why it's wrong here
Do not provide API-level throttling or validation.
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 SC-100 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 SC-100 NAT questions on configuration and troubleshooting.
Design security solutions for infrastructure — This question tests Design security solutions for infrastructure — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Rate limiting policies, validate-json policy, and OAuth 2.0 — Option D is correct: rate limiting throttles requests, policies validate JSON, and OAuth 2.0 secures access. Option A is wrong because Azure Firewall does not integrate with API Management for payload validation. Option B is wrong because WAF protects at the network edge, not per-API. Option C is wrong because Managed Identity is for authentication, not throttling or validation.
What should I do if I get this SC-100 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 SC-100 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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