This FC0-U61 practice question tests your understanding of infrastructure. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A network administrator wants to restrict access to the wireless network to only approved devices. Which security feature should be enabled on the access point?
Firewall rules
Why wrong: Firewall rules control traffic but do not prevent unauthorized association.
Disable SSID broadcast
Why wrong: Hiding the SSID is not a true security measure; it can be discovered.
WPA2 encryption
Why wrong: WPA2 encrypts data but does not restrict which devices can connect.
MAC filtering
MAC filtering allows only whitelisted MAC addresses to connect.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
MAC filtering
MAC filtering allows the access point to permit or deny network access based on the device's MAC address, which is a unique hardware identifier. By creating an allowlist of approved MAC addresses, the administrator can restrict the wireless network to only those devices. This directly addresses the requirement to limit access to approved devices.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Firewall rules
Why it's wrong here
Firewall rules control traffic but do not prevent unauthorized association.
Disable SSID broadcast
Why it's wrong here
Hiding the SSID is not a true security measure; it can be discovered.
WPA2 encryption
Why it's wrong here
WPA2 encrypts data but does not restrict which devices can connect.
MAC filtering
Why this is correct
MAC filtering allows only whitelisted MAC addresses to connect.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates often confuse MAC filtering with encryption or SSID hiding, thinking that hiding the network or using strong encryption alone can restrict device access, but neither prevents an unauthorized device from connecting if it has the SSID or password.
Detailed technical explanation
MAC filtering operates at Layer 2 of the OSI model, using the MAC address in the 802.11 frame header to make access decisions. However, MAC addresses can be spoofed easily using tools like `macchanger` or OS-level settings, so MAC filtering alone is not a strong security measure and is often combined with WPA2-Enterprise and 802.1X for robust device authentication. In real-world deployments, MAC filtering is used as a basic access control layer, but it is not considered secure against determined attackers.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A security administrator must allow nursing staff to reach a patient records server while blocking access from the guest Wi-Fi VLAN. After applying an extended ACL, traffic is still blocked from nursing workstations. The ACL was applied outbound instead of inbound on the wrong interface. Questions like this test ACL direction and placement rules.
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FAQ
Infrastructure — This question tests Infrastructure — Read the scenario before looking for a memorised answer..
The correct answer is: MAC filtering — MAC filtering allows the access point to permit or deny network access based on the device's MAC address, which is a unique hardware identifier. By creating an allowlist of approved MAC addresses, the administrator can restrict the wireless network to only those devices. This directly addresses the requirement to limit access to approved devices.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 25, 2026
This FC0-U61 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-U61 exam.
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