ISC Infrastructure And System Security Practice Question
When designing a secure network, which zone should host public-facing services to minimize the risk of lateral movement to internal networks?
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
✓
DMZ (Demilitarized Zone).
The DMZ (Demilitarized Zone) acts as a buffer, isolating public services from the internal trusted network.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Management LAN.
Why it's wrong here
This would expose management interfaces to the internet.
- ✓
DMZ (Demilitarized Zone).
Why this is correct
The DMZ is the classic architectural pattern for isolating public-facing services.
- ✗
User Access Subnet.
Why it's wrong here
This would intermix public traffic with internal user traffic.
- ✗
Back-end database subnet.
Why it's wrong here
This would place databases directly in the path of internet traffic.
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 (ISC)² exam blueprint
This ISC 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 ISC exam.