This CCSP practice question tests your understanding of cloud application 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.
Which THREE of the following are valid techniques to protect application programming interfaces (APIs) from abuse?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use API gateways to enforce authentication and authorization policies.
API gateways act as a centralized policy enforcement point, intercepting all API traffic to validate authentication (e.g., OAuth 2.0, SAML) and authorization (e.g., RBAC, ABAC) before requests reach backend services. This prevents unauthorized access and ensures that only authenticated clients with proper permissions can invoke protected endpoints, directly mitigating abuse such as credential stuffing or privilege escalation.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 API gateways to enforce authentication and authorization policies.
Why this is correct
Centralizes security controls.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use JSON Web Tokens (JWT) without encryption.
Why it's wrong here
JWTs should be signed and optionally encrypted; without encryption, payload is readable.
✗
Use only HTTP GET requests for all API calls.
Why it's wrong here
GET requests are still vulnerable to CSRF and other attacks.
✓
Implement rate limiting and throttling.
Why this is correct
Limits the number of requests, preventing DoS and brute force.
Related concept
Read the scenario before looking for a memorised answer.
✓
Require API keys or OAuth tokens for every request.
Why this is correct
Validates the client identity.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may think JWT without encryption is acceptable because JWTs are often signed (JWS), but the CCSP exam emphasizes that confidentiality is a separate requirement—signing alone does not protect sensitive data in the payload, and encryption (JWE) is mandatory when tokens contain private information.
Detailed technical explanation
How to think about this question
Rate limiting (e.g., token bucket or leaky bucket algorithms) and throttling (e.g., sliding window counters) are enforced at the API gateway or load balancer to cap the number of requests per client IP or API key within a time window (e.g., 1000 requests/hour). This prevents brute-force attacks, DDoS, and resource exhaustion by rejecting excessive traffic with HTTP 429 Too Many Requests responses, while OAuth 2.0 token introspection (RFC 7662) or API key validation ensures every request carries verifiable credentials, blocking unauthenticated or revoked clients.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A developer is choosing between AES-256 (symmetric) and RSA-2048 (asymmetric) for encrypting a large file that will be sent to a partner. Symmetric encryption is fast but requires key exchange; asymmetric is slower but solves the key distribution problem. A hybrid approach — encrypt the file with AES, encrypt the AES key with RSA — is standard. Questions like this test whether you understand when each approach applies.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Cloud Application Security — This question tests Cloud Application Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use API gateways to enforce authentication and authorization policies. — API gateways act as a centralized policy enforcement point, intercepting all API traffic to validate authentication (e.g., OAuth 2.0, SAML) and authorization (e.g., RBAC, ABAC) before requests reach backend services. This prevents unauthorized access and ensures that only authenticated clients with proper permissions can invoke protected endpoints, directly mitigating abuse such as credential stuffing or privilege escalation.
What should I do if I get this CCSP question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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This CCSP practice question is part of Courseiva's free ISC2 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 CCSP exam.
Question Discussion
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