SDSI Application Security Design Practice Question
In the context of microsegmentation, what is the primary benefit of using a 'Whitelist' approach over a 'Blacklist' approach?
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
✓
It provides a more secure, 'deny-all' default posture
A whitelist only allows known good traffic, providing a 'deny-all' default posture which is the cornerstone of a Zero Trust architecture.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
It improves performance of the underlying network
Why it's wrong here
The security approach has negligible impact on network performance.
- ✓
It provides a more secure, 'deny-all' default posture
Why this is correct
Deny-all by default is the most secure posture.
- ✗
It is easier to configure
Why it's wrong here
Whitelists require more effort to define explicitly.
- ✗
It removes the need for security policies
Why it's wrong here
It requires defining policies explicitly.
About these practice questions
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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 Cisco exam blueprint
This SDSI practice question is part of Courseiva's free Cisco 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 SDSI exam.