The correct answer is WPA2-PSK with a separate guest network enabled and content filtering via OpenDNS. This combination works because the guest network isolates wireless traffic from the main business LAN, preventing guests from accessing internal resources, while OpenDNS provides DNS-level content filtering to block inappropriate sites without requiring additional hardware. On the CompTIA A+ Core 2 220-1202 exam, this scenario tests your understanding of practical network security features for small businesses—a common performance-based question where you must choose the most compatible and widely supported solution. A frequent trap is selecting WPA3 or MAC filtering: WPA3 is not universally supported on older client devices, and MAC filtering is easily bypassed and does not enforce content restrictions. Remember the memory tip: “Guest net plus DNS block” keeps the business safe and the exam score high.
220-1102 Wireless Security Protocols Practice Question
This 220-1202 practice question tests your understanding of wireless security protocols. 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 owner wants to replace their old wireless router because guests have been using the network to access inappropriate content. The owner wants to isolate guest traffic from the main business network and enforce content filtering. Which combination of wireless security and features should the technician recommend?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
WPA2-PSK with a guest network enabled and content filtering via OpenDNS.
WPA2-PSK with a separate guest network and content filtering DNS provides both security and isolation. WPA3 is not yet widely supported on all devices, and MAC filtering is not effective for guest isolation.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
WPA3-Personal with MAC address filtering.
Why it's wrong here
MAC filtering is easily bypassed and does not isolate traffic.
✓
WPA2-PSK with a guest network enabled and content filtering via OpenDNS.
Why this is correct
A guest network isolates traffic, and DNS-based content filtering blocks inappropriate sites.
Related concept
Authentication checks who the user is.
✗
WPA2-Enterprise with a RADIUS server and no guest network.
Why it's wrong here
WPA2-Enterprise is overkill for a small business and does not provide guest isolation.
✗
WEP encryption with a hidden SSID.
Why it's wrong here
WEP is insecure and easily cracked; hiding the SSID does not provide real security or isolation.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
Authentication checks who the user is.
Authorization controls what the user is allowed to do after login.
Privilege levels affect access to EXEC and configuration commands.
AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
→Do not assume successful login means full administrative access.
→Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
→Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 220-1202 question in full detail.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related 220-1202 questions on access control and AAA configuration.
Wireless Security Protocols — This question tests Wireless Security Protocols — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: WPA2-PSK with a guest network enabled and content filtering via OpenDNS. — WPA2-PSK with a separate guest network and content filtering DNS provides both security and isolation. WPA3 is not yet widely supported on all devices, and MAC filtering is not effective for guest isolation.
What should I do if I get this 220-1202 question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related 220-1202 questions on access control and AAA configuration.
What is the key concept behind this question?
Authentication checks who the user is.
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Question Discussion
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