SSCP Network and Communications Security Practice Question
This SSCP practice question tests your understanding of network and communications security. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 uses a wireless network for employees and guests. The network uses WPA2-PSK with a single SSID, and the guest network is separate but broadcasts the same SSID. Recently, employees report intermittent connection drops and slow internet speeds. A site survey shows multiple access points from neighboring businesses operating on channels 1, 6, and 11. The business's access points are set to auto-channel selection. What is the most likely cause of the issue?
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 the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Channel interference due to overlapping channels
The correct answer is C. With multiple neighboring access points operating on channels 1, 6, and 11, and the business's access points set to auto-channel selection, the most likely cause is channel interference. Auto-channel selection may not dynamically avoid co-channel or adjacent-channel overlap, leading to contention, retransmissions, and degraded performance. The separate guest network broadcasting the same SSID can also cause client confusion and increased collisions.
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.
✗
RADIUS server misconfiguration
Why it's wrong here
RADIUS is not used with WPA2-PSK; this applies to WPA2-Enterprise.
✗
Rogue access point
Why it's wrong here
While a rogue AP could cause issues, the symptoms are more consistent with interference, and no evidence of a rogue AP is described.
✓
Channel interference due to overlapping channels
Why this is correct
Auto-channel selection often leads to channel overlap with neighboring networks, causing interference and performance degradation.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Weak PSK passphrase
Why it's wrong here
A weak passphrase would not cause intermittent drops or slow speeds; it would affect authentication only during initial connection.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse WPA2-PSK with WPA2-Enterprise and assume a RADIUS misconfiguration is involved, or they may overlook that auto-channel selection does not dynamically mitigate interference from neighboring APs on the same non-overlapping channels.
Trap categories for this question
Keyword trap
A weak passphrase would not cause intermittent drops or slow speeds; it would affect authentication only during initial connection.
Detailed technical explanation
How to think about this question
In the 2.4 GHz band, channels 1, 6, and 11 are the only non-overlapping channels (each 22 MHz wide with 5 MHz spacing). When multiple APs operate on the same or adjacent channels, they share the medium via CSMA/CA, leading to increased collisions and backoff delays. Auto-channel selection typically picks a channel at boot time based on initial noise levels but does not adapt to changing interference, so neighboring APs on overlapping channels cause hidden node problems and throughput degradation.
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 security analyst at a medium-sized enterprise encounters this scenario during an investigation or architecture review. The correct answer reflects best practice for the specific threat or control described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Security exam questions test whether you can match controls to threats in context — not just recall definitions.
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.
Network and Communications Security — This question tests Network and Communications Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Channel interference due to overlapping channels — The correct answer is C. With multiple neighboring access points operating on channels 1, 6, and 11, and the business's access points set to auto-channel selection, the most likely cause is channel interference. Auto-channel selection may not dynamically avoid co-channel or adjacent-channel overlap, leading to contention, retransmissions, and degraded performance. The separate guest network broadcasting the same SSID can also cause client confusion and increased collisions.
What should I do if I get this SSCP 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: "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?
Read the scenario before looking for a memorised answer.
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Question Discussion
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