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Exam Code: N10-009
Exam Name: CompTIA Network+
Certification Provider: CompTIA
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CompTIA Network+ N10-009 Practice Test 42

Question 410

A rack has opposing front and rear fan directions across adjacent devices. Which diagnostic or verification check MOST directly evaluates the expected network behavior in this situation?

  1. Measure room ambient temperature but not equipment inlet and rear-exhaust temperatures
  2. Use temperature and airflow measurements at rack boundaries
  3. Read fan RPM alone without assessing actual rack intake/exhaust airflow
  4. Inspect the cold aisle floor label without checking the devices' port-side airflow orientation

Explanation

Correct Answer

B:

Airflow orientation matters independently of CPU utilization. The result of the remedy is checked directly: Use temperature and airflow measurements at rack boundaries.

Incorrect Answers

A:

Measure room ambient temperature but not equipment inlet and rear-exhaust temperatures. Airflow orientation matters independently of CPU utilization. The appropriate acceptance test is: Use temperature and airflow measurements at rack boundaries.

C:

Read fan RPM alone without assessing actual rack intake/exhaust airflow. Airflow orientation matters independently of CPU utilization. The appropriate acceptance test is: Use temperature and airflow measurements at rack boundaries.

D:

Inspect the cold aisle floor label without checking the devices' port-side airflow orientation. Airflow orientation matters independently of CPU utilization. The appropriate acceptance test is: Use temperature and airflow measurements at rack boundaries.

Question 411

A patch panel contains unlabeled copper runs and incidents require random tracing. Which response MOST directly addresses the stated network problem or requirement?

  1. Keep patch-panel cables unlabeled and perform random disruptive disconnects during every incident
  2. Use identical temporary tags for multiple different wall outlets
  3. Establish port-to-outlet cable maps and consistent labeling
  4. Rename switch interface descriptions without tracing any physical outlet-to-panel run

Explanation

Correct Answer

C:

Physical cabling records make faults traceable despite logical VLAN data. A direct way to confirm the outcome is to select random outlet and trace to documented patch-panel port.

Incorrect Answers

A:

Keep patch-panel cables unlabeled and perform random disruptive disconnects during every incident. Physical cabling records make faults traceable despite logical VLAN data. This does not implement the needed approach: establish port-to-outlet cable maps and consistent labeling.

B:

Use identical temporary tags for multiple different wall outlets. Physical cabling records make faults traceable despite logical VLAN data. This does not implement the needed approach: establish port-to-outlet cable maps and consistent labeling.

D:

Rename switch interface descriptions without tracing any physical outlet-to-panel run. Physical cabling records make faults traceable despite logical VLAN data. This does not implement the needed approach: establish port-to-outlet cable maps and consistent labeling.

Question 412

A patch panel contains unlabeled copper runs and incidents require random tracing. Which diagnostic or verification check MOST directly evaluates the expected network behavior in this situation?

  1. Confirm every patch-panel port has some label but never test that a selected outlet matches it
  2. Check a floor plan drawing without tracing the live cable to the actual patch port
  3. Inspect only the switch management IP while random wall jacks remain untracked
  4. Select random outlet and trace to documented patch-panel port

Explanation

Correct Answer

D:

Physical cabling records make faults traceable despite logical VLAN data. The result of the remedy is checked directly: Select random outlet and trace to documented patch-panel port.

Incorrect Answers

A:

Confirm every patch-panel port has some label but never test that a selected outlet matches it. Physical cabling records make faults traceable despite logical VLAN data. The appropriate acceptance test is: Select random outlet and trace to documented patch-panel port.

B:

Check a floor plan drawing without tracing the live cable to the actual patch port. Physical cabling records make faults traceable despite logical VLAN data. The appropriate acceptance test is: Select random outlet and trace to documented patch-panel port.

C:

Inspect only the switch management IP while random wall jacks remain untracked. Physical cabling records make faults traceable despite logical VLAN data. The appropriate acceptance test is: Select random outlet and trace to documented patch-panel port.

Question 413

A fiber shelf has bare connectors and high patching churn. Which response MOST directly addresses the stated network problem or requirement?

  1. Use a protected fiber distribution panel with bend-radius management
  2. Leave bare fiber ends exposed to frequent handling and sharply bent patch cords
  3. Route fiber jumpers tightly around a rack corner below their approved bend radius
  4. Combine all fibers in an unprotected bundle with no strain relief or port identity

Explanation

Correct Answer

A:

Fiber handling differs from copper patch cord practices. A direct way to confirm the outcome is to inspect fiber strain and patch path against design rules.

Incorrect Answers

B:

Leave bare fiber ends exposed to frequent handling and sharply bent patch cords. Fiber handling differs from copper patch cord practices. This does not implement the needed approach: use a protected fiber distribution panel with bend-radius management.

C:

Route fiber jumpers tightly around a rack corner below their approved bend radius. Fiber handling differs from copper patch cord practices. This does not implement the needed approach: use a protected fiber distribution panel with bend-radius management.

D:

Combine all fibers in an unprotected bundle with no strain relief or port identity. Fiber handling differs from copper patch cord practices. This does not implement the needed approach: use a protected fiber distribution panel with bend-radius management.

Question 414

A fiber shelf has bare connectors and high patching churn. Which diagnostic or verification check MOST directly evaluates the expected network behavior in this situation?

  1. Check only the enclosure model name while connector contamination remains possible
  2. Inspect fiber strain and patch path against design rules
  3. Inspect the front panel doors without tracing actual patched fiber bend and strain path
  4. Verify one healthy link but not the vulnerable high-churn fiber shelf routing

Explanation

Correct Answer

B:

Fiber handling differs from copper patch cord practices. The result of the remedy is checked directly: Inspect fiber strain and patch path against design rules.

Incorrect Answers

A:

Check only the enclosure model name while connector contamination remains possible. Fiber handling differs from copper patch cord practices. The appropriate acceptance test is: Inspect fiber strain and patch path against design rules.

C:

Inspect the front panel doors without tracing actual patched fiber bend and strain path. Fiber handling differs from copper patch cord practices. The appropriate acceptance test is: Inspect fiber strain and patch path against design rules.

D:

Verify one healthy link but not the vulnerable high-churn fiber shelf routing. Fiber handling differs from copper patch cord practices. The appropriate acceptance test is: Inspect fiber strain and patch path against design rules.

Question 415

A closet accepts public contractors without locked access. Which response MOST directly addresses the stated network problem or requirement?

  1. Allow contractors unrestricted reach to core switches because the room has a corporate Wi-Fi network
  2. Remove closet locks and depend on a printed Authorized Staff Only notice
  3. Place networking gear in a lockable monitored cabinet
  4. Share cabinet keys with every visitor instead of logging physical access

Explanation

Correct Answer

C:

Network security includes physical access controls at IDF rooms. A direct way to confirm the outcome is to audit physical access logs and tamper seals.

Incorrect Answers

A:

Allow contractors unrestricted reach to core switches because the room has a corporate Wi-Fi network. Network security includes physical access controls at IDF rooms. This does not implement the needed approach: place networking gear in a lockable monitored cabinet.

B:

Remove closet locks and depend on a printed Authorized Staff Only notice. Network security includes physical access controls at IDF rooms. This does not implement the needed approach: place networking gear in a lockable monitored cabinet.

D:

Share cabinet keys with every visitor instead of logging physical access. Network security includes physical access controls at IDF rooms. This does not implement the needed approach: place networking gear in a lockable monitored cabinet.

Question 416

A closet accepts public contractors without locked access. Which diagnostic or verification check MOST directly evaluates the expected network behavior in this situation?

  1. Confirm the cabinet doors are closed but do not verify access control or lock state
  2. Check contractor badges at the main entrance but never audit closet access events
  3. Read the CCTV model description rather than the actual physical entry and tamper log
  4. Audit physical access logs and tamper seals

Explanation

Correct Answer

D:

Network security includes physical access controls at IDF rooms. The result of the remedy is checked directly: Audit physical access logs and tamper seals.

Incorrect Answers

A:

Confirm the cabinet doors are closed but do not verify access control or lock state. Network security includes physical access controls at IDF rooms. The appropriate acceptance test is: Audit physical access logs and tamper seals.

B:

Check contractor badges at the main entrance but never audit closet access events. Network security includes physical access controls at IDF rooms. The appropriate acceptance test is: Audit physical access logs and tamper seals.

C:

Read the CCTV model description rather than the actual physical entry and tamper log. Network security includes physical access controls at IDF rooms. The appropriate acceptance test is: Audit physical access logs and tamper seals.

Question 417

Core equipment needs several minutes of ride-through until generator starts. Which response MOST directly addresses the stated network problem or requirement?

  1. Size UPS runtime for critical load and transfer interval
  2. Provide a UPS whose runtime ends before the generator transfer interval
  3. Depend on equipment boot time after outage instead of ride-through power
  4. Protect only noncritical desk equipment while core network devices lose supply during transfer

Explanation

Correct Answer

A:

UPS delivers immediate short-term power; generator startup takes time. A direct way to confirm the outcome is to simulate power loss and measure delivery through transfer.

Incorrect Answers

B:

Provide a UPS whose runtime ends before the generator transfer interval. UPS delivers immediate short-term power; generator startup takes time. This does not implement the needed approach: size UPS runtime for critical load and transfer interval.

C:

Depend on equipment boot time after outage instead of ride-through power. UPS delivers immediate short-term power; generator startup takes time. This does not implement the needed approach: size UPS runtime for critical load and transfer interval.

D:

Protect only noncritical desk equipment while core network devices lose supply during transfer. UPS delivers immediate short-term power; generator startup takes time. This does not implement the needed approach: size UPS runtime for critical load and transfer interval.

Question 418

Core equipment needs several minutes of ride-through until generator starts. Which diagnostic or verification check MOST directly evaluates the expected network behavior in this situation?

  1. Read UPS battery percentage under no load without measuring required runtime
  2. Simulate power loss and measure delivery through transfer
  3. Check the generator service report but never test transfer continuity under the critical rack load
  4. Verify only one low-power device remains on while the core equipment restarts

Explanation

Correct Answer

B:

UPS delivers immediate short-term power; generator startup takes time. The result of the remedy is checked directly: Simulate power loss and measure delivery through transfer.

Incorrect Answers

A:

Read UPS battery percentage under no load without measuring required runtime. UPS delivers immediate short-term power; generator startup takes time. The appropriate acceptance test is: Simulate power loss and measure delivery through transfer.

C:

Check the generator service report but never test transfer continuity under the critical rack load. UPS delivers immediate short-term power; generator startup takes time. The appropriate acceptance test is: Simulate power loss and measure delivery through transfer.

D:

Verify only one low-power device remains on while the core equipment restarts. UPS delivers immediate short-term power; generator startup takes time. The appropriate acceptance test is: Simulate power loss and measure delivery through transfer.

Question 419

A rack's PDU rating is lower than its expected equipment current. Which response MOST directly addresses the stated network problem or requirement?

  1. Connect a rack drawing more current than the PDU rating and hope the breaker never trips
  2. Add more equipment to an already overloaded branch circuit without electrical review
  3. Recalculate electrical load and provision rated branch circuits and PDU
  4. Reduce network bandwidth instead of correcting inadequate power-distribution capacity

Explanation

Correct Answer

C:

PDU distribution cannot manufacture additional safe electrical capacity. A direct way to confirm the outcome is to check nameplate draw, measured current and breaker margins.

Incorrect Answers

A:

Connect a rack drawing more current than the PDU rating and hope the breaker never trips. PDU distribution cannot manufacture additional safe electrical capacity. This does not implement the needed approach: recalculate electrical load and provision rated branch circuits and PDU.

B:

Add more equipment to an already overloaded branch circuit without electrical review. PDU distribution cannot manufacture additional safe electrical capacity. This does not implement the needed approach: recalculate electrical load and provision rated branch circuits and PDU.

D:

Reduce network bandwidth instead of correcting inadequate power-distribution capacity. PDU distribution cannot manufacture additional safe electrical capacity. This does not implement the needed approach: recalculate electrical load and provision rated branch circuits and PDU.

Question 420

A rack's PDU rating is lower than its expected equipment current. Which diagnostic or verification check MOST directly evaluates the expected network behavior in this situation?

  1. Read device nameplate wattage individually but do not add simultaneous current demand
  2. Confirm the PDU power LED is lit while breaker and headroom limits are exceeded
  3. Measure rack load only with most switches and PoE devices powered off
  4. Check nameplate draw, measured current and breaker margins

Explanation

Correct Answer

D:

PDU distribution cannot manufacture additional safe electrical capacity. The result of the remedy is checked directly: Check nameplate draw, measured current and breaker margins.

Incorrect Answers

A:

Read device nameplate wattage individually but do not add simultaneous current demand. PDU distribution cannot manufacture additional safe electrical capacity. The appropriate acceptance test is: Check nameplate draw, measured current and breaker margins.

B:

Confirm the PDU power LED is lit while breaker and headroom limits are exceeded. PDU distribution cannot manufacture additional safe electrical capacity. The appropriate acceptance test is: Check nameplate draw, measured current and breaker margins.

C:

Measure rack load only with most switches and PoE devices powered off. PDU distribution cannot manufacture additional safe electrical capacity. The appropriate acceptance test is: Check nameplate draw, measured current and breaker margins.

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