ISC2 CC Network Security Practice Question
Which three of the following are benefits of using VLANs in a network? (Choose three.)
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
✓
Enhanced security through network segmentation
VLANs improve security through segmentation, reduce broadcast traffic, and simplify network changes. They do not increase collision domains (switches eliminate collisions) and do not replace routing.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Enhanced security through network segmentation
Why this is correct
VLANs isolate traffic between groups.
- ✗
Eliminates the need for routing
Why it's wrong here
Inter-VLAN communication still requires routing.
- ✗
Increased collision domains
Why it's wrong here
Switches already eliminate collisions; VLANs do not increase them.
- ✓
Reduction of broadcast traffic
Why this is correct
Broadcasts are confined to each VLAN.
- ✓
Simplified network administration when users move
Why this is correct
Users can be reassigned to different VLANs without rewiring.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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