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ISC2 CC Practice Question: Is a primary benefit of implementing network…
Which of the following is a primary benefit of implementing network segmentation?
⚠ Common exam trap
ISC2 often tests the misconception that segmentation eliminates the need for firewalls, but in reality, segmentation and firewalls are complementary—firewalls enforce the segmentation policy, and segmentation reduces the attack surface by limiting exposure.
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
✓
Reduced attack surface
Network segmentation divides a network into smaller, isolated segments, which limits an attacker's ability to move laterally after compromising a single host. By restricting traffic between segments using VLANs, ACLs, or firewall rules, the attack surface is reduced because fewer systems are exposed to potential threats. This is a primary security benefit, as it contains breaches and minimizes the impact of malware or unauthorized access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Reduced attack surface
Why this is correct
Limits scope of attacks.
- ✗
Eliminates the need for firewalls
Why it's wrong here
Firewalls are still needed between segments.
- ✗
Increased bandwidth
Why it's wrong here
Segmentation does not increase bandwidth.
- ✗
Simplified IP address management
Why it's wrong here
May complicate management.
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Related to this question
Learn chapter
Introduction to Security Principles
Key term
Firewall
A firewall is a network security system that monitors and controls incoming and outgoing traffic based on predetermined security rules to protect trusted internal networks from untrusted external networks.
Key term
Impact
Impact is the measure of the potential damage or harm that a risk event could cause to an organization's assets, operations, or reputation.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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