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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 50

Question 490

Security investigations lack consistent timestamps from routers and firewalls. Which diagnostic or verification check MOST directly evaluates the expected network behavior in this situation?

  1. Show logs appear in the SIEM but never calculate device clock offsets
  2. Compare event timestamps, device clock offset and ingest latency
  3. Compare one firewall event with a router event from an unrelated period
  4. Count log records without checking source timestamps and collection delay

Explanation

Correct Answer

B:

Log correlation is weak without known clock accuracy. The result of the remedy is checked directly: Compare event timestamps, device clock offset and ingest latency.

Incorrect Answers

A:

Show logs appear in the SIEM but never calculate device clock offsets. Log correlation is weak without known clock accuracy. The appropriate acceptance test is: Compare event timestamps, device clock offset and ingest latency.

C:

Compare one firewall event with a router event from an unrelated period. Log correlation is weak without known clock accuracy. The appropriate acceptance test is: Compare event timestamps, device clock offset and ingest latency.

D:

Count log records without checking source timestamps and collection delay. Log correlation is weak without known clock accuracy. The appropriate acceptance test is: Compare event timestamps, device clock offset and ingest latency.

Question 491

A syslog collector receives events but no critical alarms are routed. Which response MOST directly addresses the stated network problem or requirement?

  1. Treat receipt of low-level syslog noise as proof critical-event paging works
  2. Disable all severity mapping to avoid duplicate alarms in the central collector
  3. Normalize severity and alert conditions from device events
  4. Configure severity levels backwards so emergencies are suppressed and debug messages page staff

Explanation

Correct Answer

C:

Central storage alone does not imply operational detection. A direct way to confirm the outcome is to generate controlled high-severity message and inspect alert workflow.

Incorrect Answers

A:

Treat receipt of low-level syslog noise as proof critical-event paging works. Central storage alone does not imply operational detection. This does not implement the needed approach: normalize severity and alert conditions from device events.

B:

Disable all severity mapping to avoid duplicate alarms in the central collector. Central storage alone does not imply operational detection. This does not implement the needed approach: normalize severity and alert conditions from device events.

D:

Configure severity levels backwards so emergencies are suppressed and debug messages page staff. Central storage alone does not imply operational detection. This does not implement the needed approach: normalize severity and alert conditions from device events.

Question 492

A syslog collector receives events but no critical alarms are routed. Which diagnostic or verification check MOST directly evaluates the expected network behavior in this situation?

  1. Verify the collector accepts events but never send a high-severity test message
  2. Read alert-rule names without inspecting generated incident routing and escalation
  3. Search for historical warnings but not a controlled event at the required critical level
  4. Generate controlled high-severity message and inspect alert workflow

Explanation

Correct Answer

D:

Central storage alone does not imply operational detection. The result of the remedy is checked directly: Generate controlled high-severity message and inspect alert workflow.

Incorrect Answers

A:

Verify the collector accepts events but never send a high-severity test message. Central storage alone does not imply operational detection. The appropriate acceptance test is: Generate controlled high-severity message and inspect alert workflow.

B:

Read alert-rule names without inspecting generated incident routing and escalation. Central storage alone does not imply operational detection. The appropriate acceptance test is: Generate controlled high-severity message and inspect alert workflow.

C:

Search for historical warnings but not a controlled event at the required critical level. Central storage alone does not imply operational detection. The appropriate acceptance test is: Generate controlled high-severity message and inspect alert workflow.

Question 493

A network device exposes status via an API but polling agent cannot read it. Which response MOST directly addresses the stated network problem or requirement?

  1. Use authenticated API integration and schema-aware collection
  2. Scrape unauthenticated web pages instead of using the documented metric API and schema
  3. Make API requests with an expired token and ignore HTTP error responses
  4. Interpret API timestamps as interface throughput without checking field names and units

Explanation

Correct Answer

A:

API metrics can complement SNMP without using same transport. A direct way to confirm the outcome is to verify request permissions and returned metric timestamps.

Incorrect Answers

B:

Scrape unauthenticated web pages instead of using the documented metric API and schema. API metrics can complement SNMP without using same transport. This does not implement the needed approach: use authenticated API integration and schema-aware collection.

C:

Make API requests with an expired token and ignore HTTP error responses. API metrics can complement SNMP without using same transport. This does not implement the needed approach: use authenticated API integration and schema-aware collection.

D:

Interpret API timestamps as interface throughput without checking field names and units. API metrics can complement SNMP without using same transport. This does not implement the needed approach: use authenticated API integration and schema-aware collection.

Question 494

A network device exposes status via an API but polling agent cannot read it. Which diagnostic or verification check MOST directly evaluates the expected network behavior in this situation?

  1. Observe HTTP 200 from a login page rather than the intended authenticated metrics endpoint
  2. Verify request permissions and returned metric timestamps
  3. Read only API client configuration while never parsing returned metric timestamps
  4. Confirm DNS resolution for the device but not the metric response's schema or permissions

Explanation

Correct Answer

B:

API metrics can complement SNMP without using same transport. The result of the remedy is checked directly: Verify request permissions and returned metric timestamps.

Incorrect Answers

A:

Observe HTTP 200 from a login page rather than the intended authenticated metrics endpoint. API metrics can complement SNMP without using same transport. The appropriate acceptance test is: Verify request permissions and returned metric timestamps.

C:

Read only API client configuration while never parsing returned metric timestamps. API metrics can complement SNMP without using same transport. The appropriate acceptance test is: Verify request permissions and returned metric timestamps.

D:

Confirm DNS resolution for the device but not the metric response's schema or permissions. API metrics can complement SNMP without using same transport. The appropriate acceptance test is: Verify request permissions and returned metric timestamps.

Question 495

A packet analyzer connected to an access port sees only its own traffic. Which response MOST directly addresses the stated network problem or requirement?

  1. Connect the packet analyzer to a random access port and expect to see every VLAN's traffic
  2. Disable permitted port mirroring while leaving the monitoring port isolated from target flows
  3. Enable scoped switch port mirroring or approved inline tap
  4. Bridge monitored uplinks through the analyst laptop instead of using a scoped tap or mirror

Explanation

Correct Answer

C:

Switched Ethernet visibility requires intentional capture placement. A direct way to confirm the outcome is to compare mirrored copies with packets sourced by monitored hosts.

Incorrect Answers

A:

Connect the packet analyzer to a random access port and expect to see every VLAN's traffic. Switched Ethernet visibility requires intentional capture placement. This does not implement the needed approach: enable scoped switch port mirroring or approved inline tap.

B:

Disable permitted port mirroring while leaving the monitoring port isolated from target flows. Switched Ethernet visibility requires intentional capture placement. This does not implement the needed approach: enable scoped switch port mirroring or approved inline tap.

D:

Bridge monitored uplinks through the analyst laptop instead of using a scoped tap or mirror. Switched Ethernet visibility requires intentional capture placement. This does not implement the needed approach: enable scoped switch port mirroring or approved inline tap.

Question 496

A packet analyzer connected to an access port sees only its own traffic. Which diagnostic or verification check MOST directly evaluates the expected network behavior in this situation?

  1. Capture only the analyzer's own ARP packets and infer other devices are visible
  2. Confirm the SPAN destination link is Up without matching source-port traffic in the capture
  3. Read the mirror-session name without generating test traffic on the monitored host
  4. Compare mirrored copies with packets sourced by monitored hosts

Explanation

Correct Answer

D:

Switched Ethernet visibility requires intentional capture placement. The result of the remedy is checked directly: Compare mirrored copies with packets sourced by monitored hosts.

Incorrect Answers

A:

Capture only the analyzer's own ARP packets and infer other devices are visible. Switched Ethernet visibility requires intentional capture placement. The appropriate acceptance test is: Compare mirrored copies with packets sourced by monitored hosts.

B:

Confirm the SPAN destination link is Up without matching source-port traffic in the capture. Switched Ethernet visibility requires intentional capture placement. The appropriate acceptance test is: Compare mirrored copies with packets sourced by monitored hosts.

C:

Read the mirror-session name without generating test traffic on the monitored host. Switched Ethernet visibility requires intentional capture placement. The appropriate acceptance test is: Compare mirrored copies with packets sourced by monitored hosts.

Question 497

A SPAN destination misses packets on an oversubscribed monitor port. Which response MOST directly addresses the stated network problem or requirement?

  1. Account for monitor-port bandwidth and prefer tap when fidelity required
  2. Assume a 1Gb monitor port cannot drop copies from two fully utilized 1Gb sources
  3. Ignore SPAN oversubscription despite a legal evidentiary requirement for complete traffic
  4. Disable source-port packet counters so capture loss cannot be measured

Explanation

Correct Answer

A:

Mirrored capture may drop frames without production link failure. A direct way to confirm the outcome is to generate bounded load and compare capture count with source counters.

Incorrect Answers

B:

Assume a 1Gb monitor port cannot drop copies from two fully utilized 1Gb sources. Mirrored capture may drop frames without production link failure. This does not implement the needed approach: account for monitor-port bandwidth and prefer tap when fidelity required.

C:

Ignore SPAN oversubscription despite a legal evidentiary requirement for complete traffic. Mirrored capture may drop frames without production link failure. This does not implement the needed approach: account for monitor-port bandwidth and prefer tap when fidelity required.

D:

Disable source-port packet counters so capture loss cannot be measured. Mirrored capture may drop frames without production link failure. This does not implement the needed approach: account for monitor-port bandwidth and prefer tap when fidelity required.

Question 498

A SPAN destination misses packets on an oversubscribed monitor port. Which diagnostic or verification check MOST directly evaluates the expected network behavior in this situation?

  1. Read the pcap file size without comparing source packet totals and capture drops
  2. Generate bounded load and compare capture count with source counters
  3. Test only one light flow and infer capture fidelity under peak combined load
  4. Verify the mirror configuration exists but not whether frames are discarded at its egress

Explanation

Correct Answer

B:

Mirrored capture may drop frames without production link failure. The result of the remedy is checked directly: Generate bounded load and compare capture count with source counters.

Incorrect Answers

A:

Read the pcap file size without comparing source packet totals and capture drops. Mirrored capture may drop frames without production link failure. The appropriate acceptance test is: Generate bounded load and compare capture count with source counters.

C:

Test only one light flow and infer capture fidelity under peak combined load. Mirrored capture may drop frames without production link failure. The appropriate acceptance test is: Generate bounded load and compare capture count with source counters.

D:

Verify the mirror configuration exists but not whether frames are discarded at its egress. Mirrored capture may drop frames without production link failure. The appropriate acceptance test is: Generate bounded load and compare capture count with source counters.

Question 499

A baseline host inventory is stale after multiple unannounced installations. Which response MOST directly addresses the stated network problem or requirement?

  1. Treat last month's asset inventory as current despite new unannounced installations
  2. Disable authorized neighbor discovery to avoid finding unmanaged endpoints
  3. Run scheduled authorized network discovery
  4. Update IPAM hostnames without comparing MAC identities and discovered links

Explanation

Correct Answer

C:

Discovery is point-in-time observation, not guaranteed ownership truth. A direct way to confirm the outcome is to compare current neighbors, ARP and device identities to inventory.

Incorrect Answers

A:

Treat last month's asset inventory as current despite new unannounced installations. Discovery is point-in-time observation, not guaranteed ownership truth. This does not implement the needed approach: run scheduled authorized network discovery.

B:

Disable authorized neighbor discovery to avoid finding unmanaged endpoints. Discovery is point-in-time observation, not guaranteed ownership truth. This does not implement the needed approach: run scheduled authorized network discovery.

D:

Update IPAM hostnames without comparing MAC identities and discovered links. Discovery is point-in-time observation, not guaranteed ownership truth. This does not implement the needed approach: run scheduled authorized network discovery.

Question 500

A baseline host inventory is stale after multiple unannounced installations. Which diagnostic or verification check MOST directly evaluates the expected network behavior in this situation?

  1. Count devices in the stale inventory without conducting current segment discovery
  2. Ping a known switch but not compare new MAC and neighbor records
  3. Read DHCP pool size and assume it reveals every newly installed network device
  4. Compare current neighbors, ARP and device identities to inventory

Explanation

Correct Answer

D:

Discovery is point-in-time observation, not guaranteed ownership truth. The result of the remedy is checked directly: Compare current neighbors, ARP and device identities to inventory.

Incorrect Answers

A:

Count devices in the stale inventory without conducting current segment discovery. Discovery is point-in-time observation, not guaranteed ownership truth. The appropriate acceptance test is: Compare current neighbors, ARP and device identities to inventory.

B:

Ping a known switch but not compare new MAC and neighbor records. Discovery is point-in-time observation, not guaranteed ownership truth. The appropriate acceptance test is: Compare current neighbors, ARP and device identities to inventory.

C:

Read DHCP pool size and assume it reveals every newly installed network device. Discovery is point-in-time observation, not guaranteed ownership truth. The appropriate acceptance test is: Compare current neighbors, ARP and device identities to inventory.

CompTIA Network+ (N10-009) Practice Tests

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