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SSCP Practice Question: A company deploys a guest Wi-Fi network that must…
A company deploys a guest Wi-Fi network that must be isolated from the internal network. The network team uses VLANs and a firewall. Which configuration best ensures isolation?
⚠ Common exam trap
Candidates often confuse security features like encryption (WPA2) or hiding the SSID with network isolation, failing to recognize that VLANs and firewall rules are required for true Layer 2/3 separation.
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
✓
Create a separate VLAN for guest traffic with a firewall rule blocking access to internal subnets.
Creating a separate VLAN for guest traffic logically segments the network at Layer 2, and adding a firewall rule that explicitly blocks access to internal subnets enforces isolation at Layer 3/4. This ensures guest devices cannot reach internal resources, even if they are on the same physical infrastructure.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Configure the same SSID for both guest and internal networks but use different passwords.
Why it's wrong here
Same SSID typically implies same broadcast domain; isolation requires separate VLANs.
- ✓
Create a separate VLAN for guest traffic with a firewall rule blocking access to internal subnets.
Why this is correct
This provides both VLAN segmentation and firewall enforcement.
- ✗
Use WPA2 encryption with a pre-shared key and disable SSID broadcast.
Why it's wrong here
Encryption does not prevent traffic from reaching internal networks.
- ✗
Assign guest devices to the same subnet as internal devices but enforce MAC filtering.
Why it's wrong here
MAC filtering can be bypassed and doesn't isolate at Layer 3.
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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.