The correct answer is to use WPA3-Enterprise with EAP-TLS for authentication and to disable SSID broadcast. WPA3-Enterprise with EAP-TLS provides the highest level of security for a secure wireless network in government facilities by enforcing mutual authentication with digital certificates and robust encryption, preventing both eavesdropping and unauthorized access. Disabling SSID broadcast, while not a strong standalone defense, adds a layer of obscurity against casual scanning, which aligns with defense-in-depth principles. On the CompTIA SecurityX CAS-004 exam, this question tests your ability to distinguish between true security controls and weak, easily bypassed measures like MAC filtering or WPA2-PSK. A common trap is assuming SSID hiding is a powerful security feature, but the exam emphasizes that it only deters casual discovery. Remember the memory tip: “EAP-TLS for trust, hide the SSID for dust”—the certificate-based authentication builds trust, while hiding the network name just keeps the dust off casual eyes.
CAS-004 Security Architecture Practice Question
This CAS-004 practice question tests your understanding of security architecture. 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 security architect is designing a secure wireless network for a government facility. Which TWO of the following measures should be implemented to ensure the highest level of security? (Select TWO.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Disable SSID broadcast on the access points
WPA3-Enterprise with EAP-TLS is the most secure for authentication and encryption, and disabling SSID broadcast hides the network from casual scanning, though it is not a strong security measure. MAC filtering is easily spoofed. WPA2-PSK is less secure. Captive portals do not provide strong access control.
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.
✗
Use WPA2-PSK with a strong pre-shared key
Why it's wrong here
WPA2-PSK is vulnerable to brute force and not suitable for government facilities.
✗
Implement a captive portal with social login
Why it's wrong here
Captive portals are not secure for sensitive environments; social login introduces risk.
✓
Disable SSID broadcast on the access points
Why this is correct
Disabling SSID broadcast can deter casual discovery, though it is not a primary control.
MAC addresses can be spoofed; does not provide strong security.
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 CAS-004 subnetting questions on CIDR, address ranges, and subnet selection.
Security Architecture — This question tests Security Architecture — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: Disable SSID broadcast on the access points — WPA3-Enterprise with EAP-TLS is the most secure for authentication and encryption, and disabling SSID broadcast hides the network from casual scanning, though it is not a strong security measure. MAC filtering is easily spoofed. WPA2-PSK is less secure. Captive portals do not provide strong access control.
What should I do if I get this CAS-004 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 CAS-004 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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Question Discussion
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