CAS-004 Security Architecture Practice Question
A security engineer is integrating API security for a RESTful service. Which mechanism is used to verify that the API request has not been tampered with and originates from a legitimate client?
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
✓
JWT
JWT (JSON Web Token) is a compact, self-contained token that includes claims and a digital signature to verify integrity and authenticity.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
OAuth 2.0 authorization code
Why it's wrong here
OAuth 2.0 provides authorization, not tamper-proofing via signature.
- ✗
API key in query parameter
Why it's wrong here
API keys do not provide integrity verification.
- ✓
JWT
Why this is correct
JWT includes a signature that verifies integrity and authenticity.
- ✗
Rate limiting
Why it's wrong here
Rate limiting controls traffic volume, not token integrity.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CAS-005 practice question is part of Courseiva's free CompTIA 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 CAS-005 exam.