CAS-004 Security Architecture Practice Question
A company is implementing a zero trust architecture. Which of the following BEST describes the principle of micro-segmentation in this model?
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
✓
Isolating workloads at the virtual network interface level with granular security policies
Micro-segmentation creates isolated zones for each workload, enabling granular security policies that restrict lateral movement even within the same network segment.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Creating a single perimeter around the entire network
Why it's wrong here
This describes traditional perimeter security, not micro-segmentation.
- ✓
Isolating workloads at the virtual network interface level with granular security policies
Why this is correct
This accurately defines micro-segmentation in a zero trust model.
- ✗
Using VLANs to separate departments
Why it's wrong here
VLANs are a form of segmentation but not as granular as micro-segmentation at the workload level.
- ✗
Implementing a VPN for remote access
Why it's wrong here
VPN is a connectivity method, not a zero trust segmentation technique.
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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.