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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 49

Question 480

An enterprise still uses SNMPv2c with easily guessed community strings. Which diagnostic or verification check MOST directly evaluates the expected network behavior in this situation?

  1. Confirm an SNMPv3 process exists but never check auth/privacy in the live exchange
  2. Verify new monitoring works while the weak old v2c community is still accepted
  3. Inspect default community names without capturing actual protected management packets
  4. Capture protected management sessions and verify v2c disabled

Explanation

Correct Answer

D:

SNMPv3 supports security features that community strings alone lack. The result of the remedy is checked directly: Capture protected management sessions and verify v2c disabled.

Incorrect Answers

A:

Confirm an SNMPv3 process exists but never check auth/privacy in the live exchange. SNMPv3 supports security features that community strings alone lack. The appropriate acceptance test is: Capture protected management sessions and verify v2c disabled.

B:

Verify new monitoring works while the weak old v2c community is still accepted. SNMPv3 supports security features that community strings alone lack. The appropriate acceptance test is: Capture protected management sessions and verify v2c disabled.

C:

Inspect default community names without capturing actual protected management packets. SNMPv3 supports security features that community strings alone lack. The appropriate acceptance test is: Capture protected management sessions and verify v2c disabled.

Question 481

A monitoring agent collects counters using an unknown MIB OID. Which response MOST directly addresses the stated network problem or requirement?

  1. Consult the appropriate MIB definition before labeling metric
  2. Label the unknown OID as temperature solely because its raw integer increases
  3. Treat a counter as a gauge without checking its MIB syntax or scaling
  4. Change device routing policy to make an undocumented metric match the dashboard label

Explanation

Correct Answer

A:

OID semantics determine how raw management values are interpreted. A direct way to confirm the outcome is to compare OID type, scaling and observed counter transitions.

Incorrect Answers

B:

Label the unknown OID as temperature solely because its raw integer increases. OID semantics determine how raw management values are interpreted. This does not implement the needed approach: consult the appropriate MIB definition before labeling metric.

C:

Treat a counter as a gauge without checking its MIB syntax or scaling. OID semantics determine how raw management values are interpreted. This does not implement the needed approach: consult the appropriate MIB definition before labeling metric.

D:

Change device routing policy to make an undocumented metric match the dashboard label. OID semantics determine how raw management values are interpreted. This does not implement the needed approach: consult the appropriate MIB definition before labeling metric.

Question 482

A monitoring agent collects counters using an unknown MIB OID. Which diagnostic or verification check MOST directly evaluates the expected network behavior in this situation?

  1. Read one OID integer and infer its unit and counter behavior without the MIB
  2. Compare OID type, scaling and observed counter transitions
  3. Confirm an SNMP GET succeeds but not the object's type or update semantics
  4. Compare graph colors instead of documented scale and observed OID transitions

Explanation

Correct Answer

B:

OID semantics determine how raw management values are interpreted. The result of the remedy is checked directly: Compare OID type, scaling and observed counter transitions.

Incorrect Answers

A:

Read one OID integer and infer its unit and counter behavior without the MIB. OID semantics determine how raw management values are interpreted. The appropriate acceptance test is: Compare OID type, scaling and observed counter transitions.

C:

Confirm an SNMP GET succeeds but not the object's type or update semantics. OID semantics determine how raw management values are interpreted. The appropriate acceptance test is: Compare OID type, scaling and observed counter transitions.

D:

Compare graph colors instead of documented scale and observed OID transitions. OID semantics determine how raw management values are interpreted. The appropriate acceptance test is: Compare OID type, scaling and observed counter transitions.

Question 483

A WAN link is saturated but the team needs top talkers, not payloads. Which response MOST directly addresses the stated network problem or requirement?

  1. Capture all WAN payloads indefinitely when only top flow talkers are needed
  2. Use ICMP ping loss to infer each application's source and destination byte contribution
  3. Collect flow metadata from suitable exporters
  4. Read link capacity and assume it identifies the hosts using bandwidth

Explanation

Correct Answer

C:

Flow records summarize sessions without reconstructing full application contents. A direct way to confirm the outcome is to identify high-volume source/destination/application tuple distributions.

Incorrect Answers

A:

Capture all WAN payloads indefinitely when only top flow talkers are needed. Flow records summarize sessions without reconstructing full application contents. This does not implement the needed approach: collect flow metadata from suitable exporters.

B:

Use ICMP ping loss to infer each application's source and destination byte contribution. Flow records summarize sessions without reconstructing full application contents. This does not implement the needed approach: collect flow metadata from suitable exporters.

D:

Read link capacity and assume it identifies the hosts using bandwidth. Flow records summarize sessions without reconstructing full application contents. This does not implement the needed approach: collect flow metadata from suitable exporters.

Question 484

A WAN link is saturated but the team needs top talkers, not payloads. Which diagnostic or verification check MOST directly evaluates the expected network behavior in this situation?

  1. Confirm a flow exporter is enabled without analyzing generated source/destination tuples
  2. Check total interface octets but never aggregate traffic by application and talker
  3. Inspect a five-minute utilization average without matching exporter templates to top-volume flows
  4. Identify high-volume source/destination/application tuple distributions

Explanation

Correct Answer

D:

Flow records summarize sessions without reconstructing full application contents. The result of the remedy is checked directly: Identify high-volume source/destination/application tuple distributions.

Incorrect Answers

A:

Confirm a flow exporter is enabled without analyzing generated source/destination tuples. Flow records summarize sessions without reconstructing full application contents. The appropriate acceptance test is: Identify high-volume source/destination/application tuple distributions.

B:

Check total interface octets but never aggregate traffic by application and talker. Flow records summarize sessions without reconstructing full application contents. The appropriate acceptance test is: Identify high-volume source/destination/application tuple distributions.

C:

Inspect a five-minute utilization average without matching exporter templates to top-volume flows. Flow records summarize sessions without reconstructing full application contents. The appropriate acceptance test is: Identify high-volume source/destination/application tuple distributions.

Question 485

A suspicious TCP reset requires exact packet sequence evidence. Which response MOST directly addresses the stated network problem or requirement?

  1. Take a lawful packet capture at the relevant interface
  2. Infer TCP reset cause from a DNS record rather than capture the actual RST packet
  3. Disable packet capture on the affected interface and rely on a generic uptime alert
  4. Check interface speed settings without inspecting TCP sequence, acknowledgment and flags

Explanation

Correct Answer

A:

Packet capture exposes protocol detail absent from aggregate bandwidth charts. A direct way to confirm the outcome is to inspect flags, sequence numbers and timestamps around reset.

Incorrect Answers

B:

Infer TCP reset cause from a DNS record rather than capture the actual RST packet. Packet capture exposes protocol detail absent from aggregate bandwidth charts. This does not implement the needed approach: take a lawful packet capture at the relevant interface.

C:

Disable packet capture on the affected interface and rely on a generic uptime alert. Packet capture exposes protocol detail absent from aggregate bandwidth charts. This does not implement the needed approach: take a lawful packet capture at the relevant interface.

D:

Check interface speed settings without inspecting TCP sequence, acknowledgment and flags. Packet capture exposes protocol detail absent from aggregate bandwidth charts. This does not implement the needed approach: take a lawful packet capture at the relevant interface.

Question 486

A suspicious TCP reset requires exact packet sequence evidence. Which diagnostic or verification check MOST directly evaluates the expected network behavior in this situation?

  1. Show one packet was received but not the RST flag and sequence around failure
  2. Inspect flags, sequence numbers and timestamps around reset
  3. Capture an unrelated interface rather than the reset path at the affected time
  4. Read a firewall rule label without a packet-level trace of the abrupt TCP close

Explanation

Correct Answer

B:

Packet capture exposes protocol detail absent from aggregate bandwidth charts. The result of the remedy is checked directly: Inspect flags, sequence numbers and timestamps around reset.

Incorrect Answers

A:

Show one packet was received but not the RST flag and sequence around failure. Packet capture exposes protocol detail absent from aggregate bandwidth charts. The appropriate acceptance test is: Inspect flags, sequence numbers and timestamps around reset.

C:

Capture an unrelated interface rather than the reset path at the affected time. Packet capture exposes protocol detail absent from aggregate bandwidth charts. The appropriate acceptance test is: Inspect flags, sequence numbers and timestamps around reset.

D:

Read a firewall rule label without a packet-level trace of the abrupt TCP close. Packet capture exposes protocol detail absent from aggregate bandwidth charts. The appropriate acceptance test is: Inspect flags, sequence numbers and timestamps around reset.

Question 487

An interface's baseline utilization is 30% but now reaches 95% daily. Which response MOST directly addresses the stated network problem or requirement?

  1. Set a flat 100% utilization threshold and ignore the changed daily baseline
  2. Declare a normal 30% baseline sufficient evidence that recurring 95% peaks cannot occur
  3. Build utilization baseline alerts with time-of-day comparison
  4. Change default-gateway addresses to reduce high link utilization without traffic analysis

Explanation

Correct Answer

C:

An anomaly threshold must account for known daily workload cycles. A direct way to confirm the outcome is to correlate throughput and error counters to historical norm.

Incorrect Answers

A:

Set a flat 100% utilization threshold and ignore the changed daily baseline. An anomaly threshold must account for known daily workload cycles. This does not implement the needed approach: build utilization baseline alerts with time-of-day comparison.

B:

Declare a normal 30% baseline sufficient evidence that recurring 95% peaks cannot occur. An anomaly threshold must account for known daily workload cycles. This does not implement the needed approach: build utilization baseline alerts with time-of-day comparison.

D:

Change default-gateway addresses to reduce high link utilization without traffic analysis. An anomaly threshold must account for known daily workload cycles. This does not implement the needed approach: build utilization baseline alerts with time-of-day comparison.

Question 488

An interface's baseline utilization is 30% but now reaches 95% daily. Which diagnostic or verification check MOST directly evaluates the expected network behavior in this situation?

  1. Read only a monthly utilization average and miss repeated daily 95% spikes
  2. Observe throughput for one quiet hour without comparing same-time historical counters
  3. Check that monitoring is enabled but not whether thresholds and peak alerts trigger
  4. Correlate throughput and error counters to historical norm

Explanation

Correct Answer

D:

An anomaly threshold must account for known daily workload cycles. The result of the remedy is checked directly: Correlate throughput and error counters to historical norm.

Incorrect Answers

A:

Read only a monthly utilization average and miss repeated daily 95% spikes. An anomaly threshold must account for known daily workload cycles. The appropriate acceptance test is: Correlate throughput and error counters to historical norm.

B:

Observe throughput for one quiet hour without comparing same-time historical counters. An anomaly threshold must account for known daily workload cycles. The appropriate acceptance test is: Correlate throughput and error counters to historical norm.

C:

Check that monitoring is enabled but not whether thresholds and peak alerts trigger. An anomaly threshold must account for known daily workload cycles. The appropriate acceptance test is: Correlate throughput and error counters to historical norm.

Question 489

Security investigations lack consistent timestamps from routers and firewalls. Which response MOST directly addresses the stated network problem or requirement?

  1. Correlate time-synchronized logs using centralized syslog/SIEM
  2. Correlate firewall and router event logs without first correcting clock differences
  3. Disable syslog collection and compare manually copied device dates only
  4. Treat collector ingest time as identical to the event's original timestamp in every case

Explanation

Correct Answer

A:

Log correlation is weak without known clock accuracy. A direct way to confirm the outcome is to compare event timestamps, device clock offset and ingest latency.

Incorrect Answers

B:

Correlate firewall and router event logs without first correcting clock differences. Log correlation is weak without known clock accuracy. This does not implement the needed approach: correlate time-synchronized logs using centralized syslog/SIEM.

C:

Disable syslog collection and compare manually copied device dates only. Log correlation is weak without known clock accuracy. This does not implement the needed approach: correlate time-synchronized logs using centralized syslog/SIEM.

D:

Treat collector ingest time as identical to the event's original timestamp in every case. Log correlation is weak without known clock accuracy. This does not implement the needed approach: correlate time-synchronized logs using centralized syslog/SIEM.

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.

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