The best recommendation is to deploy WPA3-Enterprise with a RADIUS server and TLS 1.3, while using a separate SSID with WPA2-Enterprise for older devices. This dual-SSID approach directly addresses the small business’s need for strong data-in-transit encryption and authorized device access without breaking the budget, as it leverages per-user authentication via RADIUS rather than costly hardware upgrades. On the CISSP exam, this scenario tests your understanding of the Wi-Fi security trade-off between compatibility and cryptographic strength, often appearing in questions about enterprise wireless architecture. A common trap is choosing WPA3-Personal (PSK) for simplicity, which lacks the per-user accountability required for a business environment. The key is remembering that WPA3-Enterprise with TLS 1.3 provides forward secrecy and stronger handshakes, while a separate WPA2-Enterprise SSID (not PSK) maintains security for legacy devices. Memory tip: “Dual SSID, dual strength—Enterprise for both, never PSK for the old.”
CISSP Security Architecture and Engineering Practice Question
This CISSP practice question tests your understanding of security architecture and engineering. 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 small business wants to implement a secure wireless network for its office. They have a limited budget and want to ensure that data in transit is encrypted and that only authorized devices can connect. The office has 20 employees and a few guests. The business owner has heard about WPA2 and WPA3. They are concerned about security but also about compatibility with older devices. Which of the following is the BEST recommendation for a security architect?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Deploy WPA3-Enterprise with a RADIUS server and use TLS 1.3 for authentication, and for devices that do not support WPA3, use a separate SSID with WPA2-Enterprise and strong passphrase.
Provides strong security and backward compatibility; enterprise mode with RADIUS allows per-user authentication.
B
Use WPA2-PSK with a long complex passphrase and change it monthly.
Why wrong: PSK is vulnerable to dictionary attacks and shared passphrase compromises security.
C
Use open network with MAC filtering to control access.
Why wrong: Open network transmits data in plaintext; MAC filtering can be spoofed.
D
Deploy WPA3-Personal with SAE and disable all older protocols.
Why wrong: WPA3-Personal may not be supported by older devices, causing compatibility issues.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Deploy WPA3-Enterprise with a RADIUS server and use TLS 1.3 for authentication, and for devices that do not support WPA3, use a separate SSID with WPA2-Enterprise and strong passphrase.
Option A is the best recommendation because it balances security, compatibility, and budget. WPA3-Enterprise with a RADIUS server and TLS 1.3 provides strong, per-user authentication and encryption for modern devices, while a separate SSID with WPA2-Enterprise (not PSK) allows older devices to connect securely without compromising the network's overall security posture. This dual-SSID approach ensures that all traffic is encrypted and only authorized devices can connect, addressing the business's core requirements.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Deploy WPA3-Enterprise with a RADIUS server and use TLS 1.3 for authentication, and for devices that do not support WPA3, use a separate SSID with WPA2-Enterprise and strong passphrase.
Why this is correct
Provides strong security and backward compatibility; enterprise mode with RADIUS allows per-user authentication.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use WPA2-PSK with a long complex passphrase and change it monthly.
Why it's wrong here
PSK is vulnerable to dictionary attacks and shared passphrase compromises security.
✗
Use open network with MAC filtering to control access.
Why it's wrong here
Open network transmits data in plaintext; MAC filtering can be spoofed.
✗
Deploy WPA3-Personal with SAE and disable all older protocols.
Why it's wrong here
WPA3-Personal may not be supported by older devices, causing compatibility issues.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume WPA2-PSK with a strong passphrase is sufficient for a small business, overlooking the fact that PSK lacks per-user authentication and is vulnerable to offline brute-force attacks, making WPA2-Enterprise or WPA3-Enterprise the correct choice for environments requiring both security and compatibility.
Trap categories for this question
Keyword trap
PSK is vulnerable to dictionary attacks and shared passphrase compromises security.
Detailed technical explanation
How to think about this question
WPA3-Enterprise uses 802.1X authentication with EAP-TLS, which requires a RADIUS server and digital certificates for mutual authentication, providing strong security against man-in-the-middle attacks. WPA2-Enterprise similarly uses 802.1X but without the mandatory use of SAE (Simultaneous Authentication of Equals) or 192-bit security mode; however, it still offers per-user authentication and encryption via AES-CCMP. In a real-world scenario, a small business might deploy a single RADIUS server (e.g., FreeRADIUS) to handle both SSIDs, using different authentication methods (EAP-TLS for WPA3 and EAP-PEAP for WPA2) to maintain compatibility while enforcing strong access controls.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A developer is choosing between AES-256 (symmetric) and RSA-2048 (asymmetric) for encrypting a large file that will be sent to a partner. Symmetric encryption is fast but requires key exchange; asymmetric is slower but solves the key distribution problem. A hybrid approach — encrypt the file with AES, encrypt the AES key with RSA — is standard. Questions like this test whether you understand when each approach applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CISSP question in full detail.
Security Architecture and Engineering — This question tests Security Architecture and Engineering — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Deploy WPA3-Enterprise with a RADIUS server and use TLS 1.3 for authentication, and for devices that do not support WPA3, use a separate SSID with WPA2-Enterprise and strong passphrase. — Option A is the best recommendation because it balances security, compatibility, and budget. WPA3-Enterprise with a RADIUS server and TLS 1.3 provides strong, per-user authentication and encryption for modern devices, while a separate SSID with WPA2-Enterprise (not PSK) allows older devices to connect securely without compromising the network's overall security posture. This dual-SSID approach ensures that all traffic is encrypted and only authorized devices can connect, addressing the business's core requirements.
What should I do if I get this CISSP question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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