CSSLP Secure Software Requirements Practice Question
You are managing requirements for a distributed microservices application. You need to ensure that service-to-service communication is encrypted. Which requirement type best categorizes this constraint?
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
✓
Non-functional security requirement
Security requirements are often classified as non-functional requirements because they define how the system performs or behaves rather than what specific business function it provides.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Non-functional security requirement
Why this is correct
Encryption constraints are properties of the system architecture that qualify as non-functional requirements.
- ✗
Functional requirement
Why it's wrong here
Functional requirements define what the system does, not the security properties of its internals.
- ✗
Business rule
Why it's wrong here
Business rules govern organizational policy, which is distinct from technical security constraints.
- ✗
Use case description
Why it's wrong here
Use cases describe user interactions, not system-wide architectural properties.
About these practice questions
This CSSLP question is part of Courseiva's 198-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official (ISC)² exam blueprint
This CSSLP practice question is part of Courseiva's free (ISC)² 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 CSSLP exam.