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Last Update: Nov 14, 2026

N10-009 Training Course: 240 Video Lectures

N10-009 PDF Study Guide: 128 Pages

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CompTIA N10-009 Practice Test 34

Question 330

A network team observes: An installation repeatedly breaks fiber patch cords where tight bends leave a wall-mounted panel. What is the MOST appropriate corrective action or technical decision?

  1. Implement unique labels and maintain patch-to-switch port maps.
  2. Provide controlled fiber routing and minimum bend radius in the distribution panel.
  3. Arrange compatible airflow directions and cold/hot aisles with blanking panels.
  4. Connect independent power feeds and UPS paths where available.

Explanation

Correct Answer

B:

Fiber attenuation increases when cable bends too tightly. Bend radius violations cause optical loss and damage.

Incorrect Answers

A:

Implementing unique labels and maintaining patch-to-switch port maps would not provide controlled fiber routing and minimum bend radius in the distribution panel.

C:

Arrange compatible airflow directions and cold/hot aisles with blanking panels would not provide controlled fiber routing and minimum bend radius in the distribution panel.

D:

Connecting independent power feeds and UPS paths where available would not provide controlled fiber routing and minimum bend radius in the distribution panel.

Question 331

A network team addresses this situation: An installation repeatedly breaks fiber patch cords where tight bends leave a wall-mounted panel. After the corrective action, which test or result BEST verifies that the problem is resolved?

  1. Use a toner and cable map to verify the wall outlet end-to-end.
  2. Certify longest horizontal cables and check closet uplink lengths.
  3. Measure optical loss before and after corrected routing.
  4. Log humidity and dew point through load and weather changes.

Explanation

Correct Answer

C:

Optical transceiver compatibility and receive-light measurements diagnose the physical signal path before higher-layer work. Verification of this result involves measuring optical loss before and after corrected routing.

Incorrect Answers

A:

Use a toner and cable map to verify the wall outlet end-to-end. That check cannot demonstrate restoration and verification of received optical light.

B:

Certify longest horizontal cables and check closet uplink lengths. That check cannot demonstrate restoration and verification of received optical light.

D:

Stable readings above condensation risk validate environmental control. That check cannot demonstrate restoration and verification of received optical light.

Question 332

A network specialist investigates this evidence: An installation repeatedly breaks fiber patch cords where tight bends leave a wall-mounted panel. Which underlying condition BEST explains the observed failure or requirement?

  1. Patch panel and outlet labels are incomplete.
  2. The physical distribution layout exceeds horizontal link reach.
  3. Physical access to network infrastructure is uncontrolled.
  4. Bend radius violations cause optical loss and damage.

Explanation

Correct Answer

D:

Bend radius violations cause optical loss and damage. Fiber attenuation increases when cable bends too tightly.

Incorrect Answers

A:

Patch panel and outlet labels are incomplete. That does not establish restoration and verification of received optical light.

B:

The physical distribution layout exceeds horizontal link reach. That does not establish restoration and verification of received optical light.

C:

Physical access to network infrastructure is uncontrolled. That does not establish restoration and verification of received optical light.

Question 333

A network team observes: A small data-center room experiences condensation on rack surfaces after aggressive cooling changes. What is the MOST appropriate corrective action or technical decision?

  1. Control temperature and relative humidity to vendor and site design limits.
  2. Connect independent power feeds and UPS paths where available.
  3. Recalculate circuit and PDU draw, rebalance and install adequately rated feeds.
  4. Arrange compatible airflow directions and cold/hot aisles with blanking panels.

Explanation

Correct Answer

A:

Condensation can damage electronics despite low temperature. Humidity and dew point are outside equipment-safe limits.

Incorrect Answers

B:

Connecting independent power feeds and UPS paths where available would not address the need for control temperature and relative humidity to vendor and site design limits.

C:

Recalculating circuit and PDU draw, rebalance and installing adequately rated feeds would not address the need for control temperature and relative humidity to vendor and site design limits.

D:

Arrange compatible airflow directions and cold/hot aisles with blanking panels would not address the need for control temperature and relative humidity to vendor and site design limits.

Question 334

A network team addresses this situation: A small data-center room experiences condensation on rack surfaces after aggressive cooling changes. After the corrective action, which test or result BEST verifies that the problem is resolved?

  1. Inspect approvals and execute an evacuation and alarm test.
  2. Log humidity and dew point through load and weather changes.
  3. Measure steady and peak amp draw after rebalancing.
  4. Remove one feed under test and verify both gateway service and remaining power.

Explanation

Correct Answer

B:

Stable readings above condensation risk validate environmental control. Verification of this result involves log humidity and dew point through load and weather changes.

Incorrect Answers

A:

Safe alarm performance validates the facility response. That check cannot demonstrate log humidity and dew point through load and weather changes.

C:

Measure steady and peak amp draw after rebalancing. That check cannot demonstrate log humidity and dew point through load and weather changes.

D:

Communication between different IP subnets requires a routed interface or gateway rather than Layer 2 bridging alone. Verification of this result involves log humidity and dew point through load and weather changes.

Question 335

A network specialist investigates this evidence: A small data-center room experiences condensation on rack surfaces after aggressive cooling changes. Which underlying condition BEST explains the observed failure or requirement?

  1. The suppression design is not evaluated for occupied electronic facilities.
  2. The outlet distribution plan is overloaded.
  3. Humidity and dew point are outside equipment-safe limits.
  4. The supposedly redundant devices share one power failure domain.

Explanation

Correct Answer

C:

Humidity and dew point are outside equipment-safe limits. Condensation can damage electronics despite low temperature.

Incorrect Answers

A:

The suppression design is not evaluated for occupied electronic facilities.

B:

Electrical distribution must stay within safe capacity and code. That does not establish humidity and dew point are outside equipment-safe limits.

D:

The supposedly redundant devices share one power failure domain. That does not establish humidity and dew point are outside equipment-safe limits.

Question 336

A network team observes: A server room uses a sprinkler plan without considering electrical equipment and personnel egress. What is the MOST appropriate corrective action or technical decision?

  1. Control temperature and relative humidity to vendor and site design limits.
  2. Provide controlled fiber routing and minimum bend radius in the distribution panel.
  3. Connect independent power feeds and UPS paths where available.
  4. Select code-compliant fire detection and suppression with qualified safety review.

Explanation

Correct Answer

D:

Equipment protection must not override personnel safety requirements. The suppression design is not evaluated for occupied electronic facilities.

Incorrect Answers

A:

Control temperature and relative humidity to vendor and site design limits would not meet the need for code-compliant fire detection and suppression with qualified safety review.

B:

Providing controlled fiber routing and minimum bend radius in the distribution panel would not meet the need for code-compliant fire detection and suppression with qualified safety review.

C:

Connecting independent power feeds and UPS paths where available would not meet the need for code-compliant fire detection and suppression with qualified safety review.

Question 337

A network team addresses this situation: A server room uses a sprinkler plan without considering electrical equipment and personnel egress. After the corrective action, which test or result BEST verifies that the problem is resolved?

  1. Inspect approvals and execute an evacuation and alarm test.
  2. Log humidity and dew point through load and weather changes.
  3. Use a toner and cable map to verify the wall outlet end-to-end.
  4. Remove one feed under test and verify both gateway service and remaining power.

Explanation

Correct Answer

A:

Safe alarm performance validates the facility response.

Incorrect Answers

B:

Stable readings above condensation risk validate environmental control. It does not inspect approvals and execute an evacuation and alarm test.

C:

Use a toner and cable map to verify the wall outlet end-to-end. It does not inspect approvals and execute an evacuation and alarm test.

D:

Communication between different IP subnets requires a routed interface or gateway rather than Layer 2 bridging alone. Verification of this result involves inspecting approvals and execute an evacuation and alarm test.

Question 338

A network specialist investigates this evidence: A server room uses a sprinkler plan without considering electrical equipment and personnel egress. Which underlying condition BEST explains the observed failure or requirement?

  1. Humidity and dew point are outside equipment-safe limits.
  2. The suppression design is not evaluated for occupied electronic facilities.
  3. The physical distribution layout exceeds horizontal link reach.
  4. Bend radius violations cause optical loss and damage.

Explanation

Correct Answer

B:

The suppression design is not evaluated for occupied electronic facilities. Equipment protection must not override personnel safety requirements.

Incorrect Answers

A:

Humidity and dew point are outside equipment-safe limits. That does not establish the suppression design is not evaluated for occupied electronic facilities.

C:

The physical distribution layout exceeds horizontal link reach. That does not establish the suppression design is not evaluated for occupied electronic facilities.

D:

Optical transceiver compatibility and receive-light measurements diagnose the physical signal path before higher-layer work. That does not establish the suppression design is not evaluated for occupied electronic facilities.

Question 339

A network team observes: A shared tenant building allows visitors to reach unsecured core switch consoles. What is the MOST appropriate corrective action or technical decision?

  1. Install a UPS with calculated watt load and required runtime.
  2. Recalculate circuit and PDU draw, rebalance and install adequately rated feeds.
  3. Place core devices in controlled lockable racks and rooms with visitor logs.
  4. Control temperature and relative humidity to vendor and site design limits.

Explanation

Correct Answer

C:

Physical custody prevents unauthorized console and cable manipulation. Physical access to network infrastructure is uncontrolled.

Incorrect Answers

A:

Installing a UPS with calculated watt load and required runtime would not place core devices in controlled lockable racks and rooms with visitor logs.

B:

Recalculating circuit and PDU draw, rebalance and installing adequately rated feeds would not place core devices in controlled lockable racks and rooms with visitor logs.

D:

Control temperature and relative humidity to vendor and site design limits would not place core devices in controlled lockable racks and rooms with visitor logs.

Question 340

A network team addresses this situation: A shared tenant building allows visitors to reach unsecured core switch consoles. After the corrective action, which test or result BEST verifies that the problem is resolved?

  1. Run a supervised transfer test and time supported switch operation.
  2. Measure steady and peak amp draw after rebalancing.
  3. Log humidity and dew point through load and weather changes.
  4. Attempt authorized and unauthorized entry under supervision.

Explanation

Correct Answer

D:

Access controls and recorded attempts verify physical security. Verification of this result involves attempt authorized and unauthorized entry under supervision.

Incorrect Answers

A:

Run a supervised transfer test and time supported switch operation. That check cannot demonstrate attempt authorized and unauthorized entry under supervision.

B:

Measure steady and peak amp draw after rebalancing. That check cannot demonstrate attempt authorized and unauthorized entry under supervision.

C:

Stable readings above condensation risk validate environmental control. That check cannot demonstrate attempt authorized and unauthorized entry under supervision.


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