ISC2 CC Network Security Practice Question
A security team is analyzing network segmentation strategies. Which THREE of the following are benefits of using VLANs for network segmentation?
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
✓
They allow logical grouping of users regardless of physical location
VLANs provide logical separation, improve security, reduce broadcast domain size, and allow flexible grouping without physical rewiring.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
They allow logical grouping of users regardless of physical location
Why this is correct
VLANs group devices based on function, not location.
- ✗
They eliminate the need for IP addressing
Why it's wrong here
VLANs still require IP addressing for communication.
- ✗
They increase the collision domain size
Why it's wrong here
Switches eliminate collisions; VLANs do not increase collision domains.
- ✓
They reduce broadcast traffic by dividing broadcast domains
Why this is correct
Each VLAN is a separate broadcast domain.
- ✓
They can isolate sensitive systems from the rest of the network
Why this is correct
VLANs can segment traffic to enforce security policies.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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