- A
The laptop's wireless driver is outdated.
An outdated wireless driver can cause intermittent connectivity issues, such as frequent disconnects and reconnects, on a single device.
- B
The RADIUS server is rejecting the laptop's certificate intermittently.
Why wrong: While RADIUS authentication can fail intermittently, PEAP-MSCHAPv2 does not use client certificates; it uses username/password. So this option is incorrect.
- C
The office Wi-Fi channel is congested.
Why wrong: Channel congestion would affect multiple users, not just one.
- D
The laptop's power saving mode is turning off the Wi-Fi adapter.
Why wrong: Power saving mode typically turns off the adapter after a period of inactivity, not causing frequent reconnects. Driver issues are more likely.
Question 687 of 750
220-1202 PEAP-MSCHAPv2 Practice Question
This 220-1202 practice question tests your understanding of wireless security protocols. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. A key principle to apply: pEAP-MSCHAPv2. 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 user reports that their laptop frequently disconnects from the office Wi-Fi and reconnects after a few seconds. The network uses WPA2-Enterprise with PEAP-MSCHAPv2. Other users do not experience this issue. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"most likely"Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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
✓
The laptop's wireless driver is outdated.
The most likely cause is an outdated or incompatible wireless driver. This can cause intermittent connectivity issues on a single device. Other users are unaffected, and since the network uses WPA2-Enterprise with PEAP-MSCHAPv2, which relies on username/password authentication, the RADIUS server does not reject client certificates. Channel congestion would affect multiple users, and power saving mode typically turns off the adapter after inactivity, not causing frequent reconnects.
Key principle: PEAP-MSCHAPv2
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The laptop's wireless driver is outdated.
Why this is correct
An outdated wireless driver can cause intermittent connectivity issues, such as frequent disconnects and reconnects, on a single device.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
PEAP-MSCHAPv2
- ✗
The RADIUS server is rejecting the laptop's certificate intermittently.
Why it's wrong here
While RADIUS authentication can fail intermittently, PEAP-MSCHAPv2 does not use client certificates; it uses username/password. So this option is incorrect.
- ✗
The office Wi-Fi channel is congested.
Why it's wrong here
Channel congestion would affect multiple users, not just one.
- ✗
The laptop's power saving mode is turning off the Wi-Fi adapter.
Why it's wrong here
Power saving mode typically turns off the adapter after a period of inactivity, not causing frequent reconnects. Driver issues are more likely.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Candidates may incorrectly attribute a single-user issue to server-side authentication problems, but in this case the RADIUS server does not use client certificates in PEAP-MSCHAPv2, so the correct cause is a local driver issue.
Detailed technical explanation
How to think about this question
PEAP-MSCHAPv2 uses an inner authentication method where the client sends a username and password (hashed) over a TLS tunnel. The RADIUS server validates the client's certificate during the outer TLS handshake; if the certificate is revoked, expired, or the server's certificate trust store is misconfigured, the handshake fails. Intermittent failures can occur if the RADIUS server's certificate revocation list (CRL) check times out or if the server's policy engine has a race condition. The client's supplicant (e.g., Windows WLAN AutoConfig) will retry authentication after a short interval, causing the observed disconnect-reconnect cycle.
KKey Concepts to Remember
- PEAP-MSCHAPv2
- Wireless driver
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
PEAP-MSCHAPv2
Real-world example
How this comes up in practice
A junior network technician can log in to a core router but cannot reach the enable prompt or configuration mode. The AAA server is authenticating the login — but the authorisation policy only grants privilege level 1, not 15. Authentication (who you are) is working; authorisation (what you can do) is not.
Quick reference
AAA Protocol Comparison
| Protocol | Port(s) | Encryption | Transport | Primary Use |
|---|---|---|---|---|
| RADIUS | 1812 / 1813 | Password only | UDP | Network access control |
| TACACS+ | 49 | Full packet | TCP | Device administration |
| Diameter | 3868 | Full session | TCP / SCTP | Carrier / mobile networks |
| 802.1X | — | EAP-based | Layer 2 | Port-based access control |
TACACS+ encrypts the entire packet; RADIUS only encrypts the password field — a key exam distinction.
What to study next
Got this wrong? Here's your next step.
Review pEAP-MSCHAPv2, then practise related 220-1202 questions on the same topic to reinforce the concept.
- →
Wireless Security Protocols — study guide chapter
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Wireless Security Protocols practice questions
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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 — PEAP-MSCHAPv2.
What is the correct answer to this question?
The correct answer is: The laptop's wireless driver is outdated. — The most likely cause is an outdated or incompatible wireless driver. This can cause intermittent connectivity issues on a single device. Other users are unaffected, and since the network uses WPA2-Enterprise with PEAP-MSCHAPv2, which relies on username/password authentication, the RADIUS server does not reject client certificates. Channel congestion would affect multiple users, and power saving mode typically turns off the adapter after inactivity, not causing frequent reconnects.
What should I do if I get this 220-1202 question wrong?
Review pEAP-MSCHAPv2, then practise related 220-1202 questions on the same topic to reinforce the concept.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
PEAP-MSCHAPv2
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Last reviewed: Jul 4, 2026
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