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FC0-U71 Practice Question: A small business wants to set up a wireless…
A small business wants to set up a wireless network for employees and guests. The owners are concerned about unauthorized access. Which of the following security measures would be MOST effective to prevent outsiders from connecting?
⚠ Common exam trap
A common mix-up: candidates think MAC filtering or hiding the SSID are strong security measures, but these are 'security through obscurity' techniques that provide no real protection against a determined attacker.
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
✓
Use WPA2 encryption with a strong passphrase
WPA2 encryption with a strong passphrase is the most effective measure because it encrypts all wireless traffic and requires authentication before a device can join the network. Without the correct pre-shared key (PSK), an attacker cannot decrypt the data or gain access, even if they can see the network. This directly prevents unauthorized outsiders from connecting, unlike the other options which are easily bypassed.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enable MAC address filtering
Why it's wrong here
MAC addresses can be spoofed easily.
- ✗
Disable SSID broadcast
Why it's wrong here
Hiding SSID is a weak security measure; attackers can still detect the network.
- ✗
Disable DHCP on the router
Why it's wrong here
Without DHCP, devices can still connect with static IP if they know the subnet.
- ✓
Use WPA2 encryption with a strong passphrase
Why this is correct
WPA2 provides strong encryption and authentication.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This FC0-U71 practice question is part of Courseiva's free CompTIA 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 FC0-U71 exam.