Question 270
A network team observes: Three nearby access points use channels 1, 2, and 3 and clients have high retries despite strong RSSI. What is the MOST appropriate corrective action or technical decision?
- Use DFS-compliant operation or plan a suitable non-DFS channel if needed.
- Plan nonoverlapping 20MHz channels such as 1, 6, 11 in the permitted regulatory domain.
- Reduce channel width where dense deployments need more independent channels.
- Keep a common enterprise SSID while allowing each radio its distinct BSSID.
Explanation
Correct Answer
B:Narrow nonoverlapping channels reduce contention and interference. Overlapping 2.4ghz channels create adjacent-channel interference.
Incorrect Answers
A:Using DFS-compliant operation or plan a suitable non-DFS channel if needed would not plan nonoverlapping 20MHz channels such as 1, 6, 11 in the permitted regulatory domain.
C:Reduce channel width where dense deployments need more independent channels would not plan nonoverlapping 20MHz channels such as 1, 6, 11 in the permitted regulatory domain.
D:Keeping a common enterprise SSID while allowing each radio its distinct BSSID would not plan nonoverlapping 20MHz channels such as 1, 6, 11 in the permitted regulatory domain.
Question 271
A network team addresses this situation: Three nearby access points use channels 1, 2, and 3 and clients have high retries despite strong RSSI. After the corrective action, which test or result BEST verifies that the problem is resolved?
- Inspect controller DFS event log and observed channel migration.
- Measure aggregate cell throughput and contention after reducing width.
- Measure retry rate after channel survey and retuning.
- Observe one client moving across APs and BSSID changes without losing service.
Explanation
Correct Answer
C:Improved retries under load validate channel plan.
Incorrect Answers
A:Event and move confirm correct DFS handling. It does not measure retry rate after channel survey and retuning.
B:Area throughput validates the dense RF tradeoff. It does not measure retry rate after channel survey and retuning.
D:Changed BSSID with stable service confirms roaming. It does not measure retry rate after channel survey and retuning.
Question 272
A network specialist investigates this evidence: Three nearby access points use channels 1, 2, and 3 and clients have high retries despite strong RSSI. Which underlying condition BEST explains the observed failure or requirement?
- DFS regulation requires vacating radar-sensitive channels.
- Guest access lacks captive acknowledgement and segmentation.
- Enterprise authentication infrastructure is unavailable for casual guests.
- Overlapping 2.4GHz channels create adjacent-channel interference.
Explanation
Correct Answer
D:Overlapping 2.4GHz channels create adjacent-channel interference. Narrow nonoverlapping channels reduce contention and interference.
Incorrect Answers
A:Regulatory radar protection supersedes static channel preference. That does not establish overlapping 2.4GHz channels create adjacent-channel interference.
B:Guest access lacks captive acknowledgement and segmentation. That does not establish overlapping 2.4GHz channels create adjacent-channel interference.
C:Enterprise authentication infrastructure is unavailable for casual guests. That does not establish overlapping 2.4GHz channels create adjacent-channel interference.
Question 273
A network team observes: A 5GHz access point suddenly changes channel after radar is detected and some clients disconnect briefly. What is the MOST appropriate corrective action or technical decision?
- Use DFS-compliant operation or plan a suitable non-DFS channel if needed.
- Plan nonoverlapping 20MHz channels such as 1, 6, 11 in the permitted regulatory domain.
- Reduce channel width where dense deployments need more independent channels.
- Apply suitable band steering and maintain acceptable 2.4GHz coverage for legacy devices.
Explanation
Correct Answer
A:Regulatory radar protection supersedes static channel preference. Dfs regulation requires vacating radar-sensitive channels.
Incorrect Answers
B:Planning nonoverlapping 20MHz channels such as 1, 6, 11 in the permitted regulatory domain would not meet the need for dFS-compliant operation or plan a suitable non-DFS channel if needed.
C:Reduce channel width where dense deployments need more independent channels would not meet the need for dFS-compliant operation or plan a suitable non-DFS channel if needed.
D:Applying suitable band steering and maintaining acceptable 2.4GHz coverage for legacy devices would not meet the need for dFS-compliant operation or plan a suitable non-DFS channel if needed.
Question 274
A network team addresses this situation: A 5GHz access point suddenly changes channel after radar is detected and some clients disconnect briefly. After the corrective action, which test or result BEST verifies that the problem is resolved?
- Measure aggregate cell throughput and contention after reducing width.
- Inspect controller DFS event log and observed channel migration.
- Measure retry rate after channel survey and retuning.
- Accept portal and test internet versus internal printer reachability.
Explanation
Correct Answer
B:Event and move confirm correct DFS handling.
Incorrect Answers
A:Area throughput validates the dense RF tradeoff. It does not inspect controller DFS event log and observed channel migration.
C:That test concerns 2.4ghz channel overlap rather than the specific reported condition. Event and move confirm correct DFS handling.
D:Guest success and internal denial validate both rules. It does not inspect controller DFS event log and observed channel migration.
Question 275
A network specialist investigates this evidence: A 5GHz access point suddenly changes channel after radar is detected and some clients disconnect briefly. Which underlying condition BEST explains the observed failure or requirement?
- Overlapping 2.4GHz channels create adjacent-channel interference.
- Wide channels reduce usable nonoverlapping channel choices.
- DFS regulation requires vacating radar-sensitive channels.
- Band choice is not optimized for supported clients.
Explanation
Correct Answer
C:DFS regulation requires vacating radar-sensitive channels. Regulatory radar protection supersedes static channel preference.
Incorrect Answers
A:This describes the 2.4ghz channel overlap mechanism, not the failure in this case. Regulatory radar protection supersedes static channel preference.
B:Wide channels reduce usable nonoverlapping channel choices. That does not establish dFS regulation requires vacating radar-sensitive channels.
D:Band choice is not optimized for supported clients. That does not establish dFS regulation requires vacating radar-sensitive channels.
Question 276
A network team observes: A site enables a 6GHz-only SSID but older laptops cannot find it while new devices connect. What is the MOST appropriate corrective action or technical decision?
- Adjust placement and applicable RTS/CTS or RF cell design.
- Apply suitable band steering and maintain acceptable 2.4GHz coverage for legacy devices.
- Keep a common enterprise SSID while allowing each radio its distinct BSSID.
- Provide an appropriate compatible 5GHz SSID or upgrade clients with 6GHz-capable radios.
Explanation
Correct Answer
D:6GHz connectivity requires suitable client radio and regulatory support. Legacy radios cannot discover unsupported 6ghz bands.
Incorrect Answers
A:Adjusting placement and applicable RTS/CTS or RF cell design would not provide an appropriate compatible 5GHz SSID or upgrade clients with 6GHz-capable radios.
B:Applying suitable band steering and maintaining acceptable 2.4GHz coverage for legacy devices would not provide an appropriate compatible 5GHz SSID or upgrade clients with 6GHz-capable radios.
C:Keeping a common enterprise SSID while allowing each radio its distinct BSSID would not provide an appropriate compatible 5GHz SSID or upgrade clients with 6GHz-capable radios.
Question 277
A network team addresses this situation: A site enables a 6GHz-only SSID but older laptops cannot find it while new devices connect. After the corrective action, which test or result BEST verifies that the problem is resolved?
- Review client adapter capability and successful 5GHz association.
- Capture retries and frame timing after a controlled mitigation.
- Accept portal and test internet versus internal printer reachability.
- Survey signal and roaming across the intended aisle map.
Explanation
Correct Answer
A:Review client adapter capability and successful 5GHz association.
Incorrect Answers
B:Lower collision rate supports the hidden-node diagnosis. It does not review client adapter capability and successful 5GHz association.
C:Guest success and internal denial validate both rules. It does not review client adapter capability and successful 5GHz association.
D:Survey signal and roaming across the intended aisle map. It does not review client adapter capability and successful 5GHz association.
Question 278
A network specialist investigates this evidence: A site enables a 6GHz-only SSID but older laptops cannot find it while new devices connect. Which underlying condition BEST explains the observed failure or requirement?
- Hidden-station behavior causes collisions at the receiver.
- Legacy radios cannot discover unsupported 6GHz bands.
- Band choice is not optimized for supported clients.
- Antenna pattern does not concentrate power toward the far endpoint.
Explanation
Correct Answer
B:Legacy radios cannot discover unsupported 6GHz bands. 6GHz connectivity requires suitable client radio and regulatory support.
Incorrect Answers
A:Hidden-station behavior causes collisions at the receiver. That does not establish legacy radios cannot discover unsupported 6GHz bands.
C:Band choice is not optimized for supported clients. That does not establish legacy radios cannot discover unsupported 6GHz bands.
D:Antenna pattern does not concentrate power toward the far endpoint.
Question 279
A network team observes: Dual-band clients crowd 2.4GHz while 5GHz remains lightly used. What is the MOST appropriate corrective action or technical decision?
- Provide an appropriate compatible 5GHz SSID or upgrade clients with 6GHz-capable radios.
- Use DFS-compliant operation or plan a suitable non-DFS channel if needed.
- Apply suitable band steering and maintain acceptable 2.4GHz coverage for legacy devices.
- Reduce channel width where dense deployments need more independent channels.
Explanation
Correct Answer
C:Capable devices can shift to less-congested 5GHz channels. Band choice is not optimized for supported clients.
Incorrect Answers
A:Providing an appropriate compatible 5GHz SSID or upgrade clients with 6GHz-capable radios would not apply suitable band steering and maintain acceptable 2.4GHz coverage for legacy devices.
B:Using DFS-compliant operation or plan a suitable non-DFS channel if needed would not apply suitable band steering and maintain acceptable 2.4GHz coverage for legacy devices.
D:Reduce channel width where dense deployments need more independent channels would not apply suitable band steering and maintain acceptable 2.4GHz coverage for legacy devices.
Question 280
A network team addresses this situation: Dual-band clients crowd 2.4GHz while 5GHz remains lightly used. After the corrective action, which test or result BEST verifies that the problem is resolved?
- Inspect controller DFS event log and observed channel migration.
- Review client adapter capability and successful 5GHz association.
- Measure aggregate cell throughput and contention after reducing width.
- Compare association distribution and throughput after steering.
Explanation
Correct Answer
D:Migration without coverage loss validates steering.4ghz coverage for legacy devices.
Incorrect Answers
A:Event and move confirm correct DFS handling. It does not compare association distribution and throughput after steering.
B:Review client adapter capability and successful 5GHz association. It does not compare association distribution and throughput after steering.
C:Area throughput validates the dense RF tradeoff.
CompTIA Network+ (N10-009) Practice Tests