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N10-009 Premium File: 768 Questions & Answers

Last Update: Nov 14, 2026

N10-009 Training Course: 240 Video Lectures

N10-009 PDF Study Guide: 128 Pages

$79.99

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CompTIA N10-009 Practice Test 38

Question 370

A network team addresses this situation: A network engineer changes a core router's routing policy during peak traffic without business notification. After the corrective action, which test or result BEST verifies that the problem is resolved?

  1. Cross-check procurement, vendor EOS and discovered devices.
  2. Inspect the ticket and test the rollback procedure in a safe environment.
  3. Compare device version output against the inventory for representative branches.
  4. Compare a sampled route table and subnet to the approved diagram.

Explanation

Correct Answer

B:

Approved scope and rollback evidence validate change governance. Verification of this result involves inspecting the ticket and test the rollback procedure in a safe environment.

Incorrect Answers

A:

Reconciled support status validates asset lifecycle records. It does not inspect the ticket and test the rollback procedure in a safe environment.

C:

Compare device version output against the inventory for representative branches. It does not inspect the ticket and test the rollback procedure in a safe environment.

D:

IP routing depends on a route to the destination prefix and a reachable next hop. It does not inspect the ticket and test the rollback procedure in a safe environment.

Question 371

A network specialist investigates this evidence: A network engineer changes a core router's routing policy during peak traffic without business notification. Which underlying condition BEST explains the observed failure or requirement?

  1. Asset inventory does not track owner and vendor support lifecycle.
  2. Network software version and support records are missing.
  3. The change lacks impact analysis and authorized window.
  4. The rack elevation and hardware dimensions were never captured.

Explanation

Correct Answer

C:

The change lacks impact analysis and authorized window. Change control reduces outages caused by uncoordinated modifications.

Incorrect Answers

A:

Asset inventory does not track owner and vendor support lifecycle. The missing change involves the change lacks impact analysis and authorized window.

B:

Network software version and support records are missing. That does not establish the change lacks impact analysis and authorized window.

D:

The rack elevation and hardware dimensions were never captured. That does not establish the change lacks impact analysis and authorized window.

Question 372

A network team observes: Retired firewall hardware is sent to recycling with old VPN keys and IP topology stored locally. What is the MOST appropriate corrective action or technical decision?

  1. Update routed subnet and gateway diagrams from observed configuration.
  2. Use centralized IP address management with reservation and conflict detection.
  3. Use a change request with dependency review, approval, backout and communication.
  4. Revoke certificates, sanitize storage and document custody before disposal.

Explanation

Correct Answer

D:

Decommissioning must address secrets and residual configuration data. Device retirement omitted secure media and credential handling.

Incorrect Answers

A:

Updating routed subnet and gateway diagrams from observed configuration would not revoke certificates, sanitize storage and document custody.

B:

Using centralized IP address management with reservation and conflict detection would not revoke certificates, sanitize storage and document custody.

C:

Using a change request with dependency review, approval, backout and communication would not revoke certificates, sanitize storage and document custody.

Question 373

A network team addresses this situation: Retired firewall hardware is sent to recycling with old VPN keys and IP topology stored locally. After the corrective action, which test or result BEST verifies that the problem is resolved?

  1. Verify certificate revocation and asset-level disposal evidence.
  2. Compare a sampled route table and subnet to the approved diagram.
  3. Attempt a duplicate allocation through the IPAM workflow.
  4. Inspect the rack elevation against physical available rack units.

Explanation

Correct Answer

A:

Access loss and documented disposition validate retirement.

Incorrect Answers

B:

IP routing depends on a route to the destination prefix and a reachable next hop. It does not verify certificate revocation and asset-level disposal evidence.

C:

Attempt a duplicate allocation through the IPAM workflow. It does not verify certificate revocation and asset-level disposal evidence.

D:

Inspect the rack elevation against physical available rack units. It does not verify certificate revocation and asset-level disposal evidence.

Question 374

A network specialist investigates this evidence: Retired firewall hardware is sent to recycling with old VPN keys and IP topology stored locally. Which underlying condition BEST explains the observed failure or requirement?

  1. The logical Layer 3 diagram is outdated.
  2. Device retirement omitted secure media and credential handling.
  3. IP allocations are not governed from one authoritative inventory.
  4. Logical routes alone do not represent cable termination paths.

Explanation

Correct Answer

B:

Device retirement omitted secure media and credential handling. Decommissioning must address secrets and residual configuration data.

Incorrect Answers

A:

The logical Layer 3 diagram is outdated. That does not establish device retirement omitted secure media and credential handling.

C:

IP allocations are not governed from one authoritative inventory. That does not establish device retirement omitted secure media and credential handling.

D:

Logical routes alone do not represent cable termination paths. That does not establish device retirement omitted secure media and credential handling.

Question 375

A network team observes: An outage team sees the routed subnet diagram but cannot identify a damaged intermediate cross-connect. What is the MOST appropriate corrective action or technical decision?

  1. Specify observation windows, exclusions, reporting and remedies in the SLA.
  2. Perform a predictive and post-install site survey with coverage heatmap.
  3. Maintain separate physical cable maps and logical network diagrams linked by identifiers.
  4. Use centralized IP address management with reservation and conflict detection.

Explanation

Correct Answer

C:

Layer 1 faults require physical path visibility beyond IP paths. Logical routes alone do not represent cable termination paths.

Incorrect Answers

A:

Specifying observation windows, exclusions, reporting and remedies in the SLA would not maintain separate physical cable maps and logical network diagrams linked by identifiers.

B:

Performing a predictive and post-install site survey with coverage heatmap would not maintain separate physical cable maps and logical network diagrams linked by identifiers.

D:

Using centralized IP address management with reservation and conflict detection would not maintain separate physical cable maps and logical network diagrams linked by identifiers.

Question 376

A network team addresses this situation: An outage team sees the routed subnet diagram but cannot identify a damaged intermediate cross-connect. After the corrective action, which test or result BEST verifies that the problem is resolved?

  1. Reconcile monitored outage minutes against the contracted calculation.
  2. Attempt a duplicate allocation through the IPAM workflow.
  3. Measure RSSI and throughput in intended scanner locations.
  4. Trace actual patch paths and reconcile them with the physical map.

Explanation

Correct Answer

D:

End-to-end tracing proves the right diagram was used.

Incorrect Answers

A:

Reconcile monitored outage minutes against the contracted calculation. That check cannot demonstrate trace actual patch paths and reconcile them with the physical map.

B:

Attempt a duplicate allocation through the IPAM workflow. That check cannot demonstrate trace actual patch paths and reconcile them with the physical map.

C:

Measure RSSI and throughput in intended scanner locations. That check cannot demonstrate trace actual patch paths and reconcile them with the physical map.

Question 377

A network specialist investigates this evidence: An outage team sees the routed subnet diagram but cannot identify a damaged intermediate cross-connect. Which underlying condition BEST explains the observed failure or requirement?

  1. Logical routes alone do not represent cable termination paths.
  2. IP allocations are not governed from one authoritative inventory.
  3. The SLA lacks measurable service definitions.
  4. Wireless design relied on desk estimates rather than site measurements.

Explanation

Correct Answer

A:

Logical routes alone do not represent cable termination paths. Layer 1 faults require physical path visibility beyond IP paths.

Incorrect Answers

B:

IP allocations are not governed from one authoritative inventory. That does not establish logical routes alone do not represent cable termination paths.

C:

The SLA lacks measurable service definitions. That does not establish logical routes alone do not represent cable termination paths.

D:

Wireless design relied on desk estimates rather than site measurements. The missing change involves logical routes alone do not represent cable termination paths.

Question 378

A network team observes: Operations needs periodic switch CPU and interface-utilization counters from supported managed devices. What is the MOST appropriate corrective action or technical decision?

  1. Monitor running configuration against approved revisions and alert on deviation.
  2. Use monitored SNMP queries with authenticated SNMPv3 where supported.
  3. Run synthetic external DNS and HTTPS checks with service-level success criteria.
  4. Correct the trap destination and approved UDP 162 delivery path.

Explanation

Correct Answer

B:

Polling management objects provides regularly sampled device metrics. They need scheduled management data rather than event-only alerts.

Incorrect Answers

A:

They need scheduled management data rather than event-only alerts.

C:

Running synthetic external DNS and HTTPS checks with service-level success criteria would not meet the need for monitored SNMP queries with authenticated SNMPv3 where supported.

D:

Correcting the trap destination and approved UDP 162 delivery path would not meet the need for monitored SNMP queries with authenticated SNMPv3 where supported.

Question 379

A network team addresses this situation: Operations needs periodic switch CPU and interface-utilization counters from supported managed devices. After the corrective action, which test or result BEST verifies that the problem is resolved?

  1. Make a controlled test change and confirm drift alert and reversal.
  2. Capture a polling session and verify private credentials and payloads are not exposed.
  3. Compare polled counters with the switch's local interface command.
  4. Break one approved probe dependency and verify alert triggers.

Explanation

Correct Answer

C:

Compare polled counters with the switch's local interface command.

Incorrect Answers

A:

Make a controlled test change and confirm drift alert and reversal. It does not compare polled counters with the switch's local interface command.

B:

Capture a polling session and verify private credentials and payloads are not exposed.

D:

Alert on failed transaction validates service monitoring. It does not compare polled counters with the switch's local interface command.

Question 380

A network team observes: An old SNMP deployment exposes write community strings on a shared network segment. What is the MOST appropriate corrective action or technical decision?

  1. Correct the trap destination and approved UDP 162 delivery path.
  2. Use monitored SNMP queries with authenticated SNMPv3 where supported.
  3. Capture both ends of TLS negotiation and inspect certificate or protocol alerts.
  4. Migrate supported devices to SNMPv3 authentication and privacy with scoped accounts.

Explanation

Correct Answer

D:

SNMPv3 can authenticate and encrypt network management exchanges. Snmpv2c communities are sent without strong message privacy.

Incorrect Answers

A:

Correcting the trap destination and approved UDP 162 delivery path would not migrate supported devices to SNMPv3 authentication and privacy with scoped accounts.

B:

Using monitored SNMP queries with authenticated SNMPv3 where supported would not migrate supported devices to SNMPv3 authentication and privacy with scoped accounts.

C:

Snmpv2c communities are sent without strong message privacy.


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