- A
WPA3-Personal with MAC address filtering.
Why wrong: MAC filtering is easily bypassed and does not isolate traffic.
- B
WPA2-PSK with a guest network enabled and content filtering via OpenDNS.
A guest network isolates traffic, and DNS-based content filtering blocks inappropriate sites.
- C
WPA2-Enterprise with a RADIUS server and no guest network.
Why wrong: WPA2-Enterprise is overkill for a small business and does not provide guest isolation.
- D
WEP encryption with a hidden SSID.
Why wrong: WEP is insecure and easily cracked; hiding the SSID does not provide real security or isolation.
Question 723 of 750
How to Isolate Guest Traffic and Enforce Content Filtering
This 220-1202 practice question tests your understanding of wireless security protocols. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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?
Quick Answer
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.
Answer choices
Why each option matters
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.
Option B is correct because WPA2-PSK with a guest network creates a separate VLAN or subnet that isolates guest traffic from the main business network, preventing guests from accessing internal resources. Content filtering via OpenDNS provides DNS-level filtering to block inappropriate content without requiring additional hardware, addressing both isolation and content control 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.
- ✗
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
Read the scenario before looking for a memorised answer.
- ✗
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: answer the scenario, not the keyword
The trap here is that candidates often choose WPA3-Personal or WPA2-Enterprise thinking stronger encryption equals better security, but the question specifically requires guest isolation and content filtering, which are features of a guest network and DNS-level filtering, not of the authentication protocol itself.
Detailed technical explanation
How to think about this question
A guest network typically uses VLAN tagging (802.1Q) or subnet separation to enforce Layer 3 isolation, often combined with client isolation to prevent peer-to-peer communication. OpenDNS content filtering works by resolving DNS queries through Cisco's servers, which block requests to known inappropriate domains based on customizable categories; this is effective even if the client uses HTTPS because the DNS lookup occurs before the TLS handshake. In a real-world deployment, the technician should also disable 'Allow access to local network' on the guest SSID to ensure complete isolation.
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 help-desk technician troubleshoots why a newly connected PC cannot reach shared printers on the same floor. The cable is good, the switch port is active, but the PC is in VLAN 20 and the printers are in VLAN 10. The uplink trunk only allows VLAN 10. A trunk being up does not mean every VLAN crosses it.
Visual reference
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
Wireless Security Protocols — study guide chapter
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FAQ
Questions learners often ask
What does this 220-1202 question test?
Wireless Security Protocols — This question tests Wireless Security Protocols — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: WPA2-PSK with a guest network enabled and content filtering via OpenDNS. — Option B is correct because WPA2-PSK with a guest network creates a separate VLAN or subnet that isolates guest traffic from the main business network, preventing guests from accessing internal resources. Content filtering via OpenDNS provides DNS-level filtering to block inappropriate content without requiring additional hardware, addressing both isolation and content control requirements.
What should I do if I get this 220-1202 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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