SSCP Network and Communications Security Practice Question
A network administrator is tasked with segmenting the network to isolate a DMZ containing public-facing web servers from the internal corporate network. Which device should be placed between the DMZ and internal network, and what type of traffic should it allow?
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
✓
Firewall; allow only specific traffic from internal to DMZ and block DMZ-initiated connections to internal.
A firewall should be used to control traffic; it should allow only necessary inbound and outbound traffic while blocking direct access from DMZ to internal 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.
- ✗
Router; allow all traffic but use NAT.
Why it's wrong here
NAT does not provide sufficient security; a firewall is needed.
- ✗
IDS; monitor traffic but do not block.
Why it's wrong here
An IDS only monitors, it does not enforce segmentation.
- ✓
Firewall; allow only specific traffic from internal to DMZ and block DMZ-initiated connections to internal.
Why this is correct
A firewall can enforce least privilege between segments.
- ✗
Switch; allow all traffic between DMZ and internal network.
Why it's wrong here
A switch does not provide security filtering.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This SSCP practice question is part of Courseiva's free ISC2 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 SSCP exam.