The answer is enabling MAC address filtering and using WPA2 encryption, as these are two effective methods to secure a wireless network from unauthorized access. WPA2 provides strong encryption that scrambles data between devices and the router, making it extremely difficult for attackers to intercept or crack the password, while MAC filtering acts as an access control list by allowing only specific devices with approved hardware addresses to connect. On the CompTIA ITF+ FC0-U61 exam, this question tests your understanding of basic network security controls, often appearing as a multiple-select item where you must distinguish between effective measures and common pitfalls like WEP encryption or disabling the firewall. A frequent trap is confusing MAC filtering with full security—it adds a layer but is not foolproof, as MAC addresses can be spoofed. Remember the mnemonic “WPA2 + MAC = double lock” to recall that encryption and device filtering together create a stronger defense than either alone.
FC0-U61 Infrastructure Practice Question
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.
Which TWO of the following are effective methods to help secure a wireless network from unauthorized access?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enabling WPA2 encryption
WPA2 encryption and MAC filtering are effective. WEP is weak and easily broken, broadcasting SSID makes the network visible, and disabling the firewall reduces security.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
Broadcasting the SSID makes the network visible, not a security measure.
Common exam traps
Common exam trap: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Detailed technical explanation
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
CIDR notation defines the prefix length.
Block size helps identify subnet boundaries.
Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
The required host count determines the smallest suitable subnet.
TExam Day Tips
→Write the block size before choosing the subnet.
→Check whether the question asks for hosts, subnets or a specific address range.
→Do not confuse /24, /25, /26 and /27 host counts.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Real-world example
How this comes up in practice
A network engineer segments a warehouse floor into three subnets: 20 scanners, 5 printers, and 2 management hosts. Picking the wrong mask wastes addresses or leaves too few usable hosts. Exam questions test whether you can apply CIDR notation, calculate block size, and identify the correct usable-host range for a given prefix.
What to study next
Got this wrong? Here's your next step.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related FC0-U61 subnetting questions on CIDR, address ranges, and subnet selection.
Infrastructure — This question tests Infrastructure — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: Enabling WPA2 encryption — WPA2 encryption and MAC filtering are effective. WEP is weak and easily broken, broadcasting SSID makes the network visible, and disabling the firewall reduces security.
What should I do if I get this FC0-U61 question wrong?
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related FC0-U61 subnetting questions on CIDR, address ranges, and subnet selection.
What is the key concept behind this question?
CIDR notation defines the prefix length.
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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.
Question Discussion
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