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Exam Code: NetSec-Analyst

Exam Name: Palo Alto Networks Certified Network Security Analyst

Certification Provider: Palo Alto Networks

Corresponding Certification: Palo Alto Networks Certified Network Security Analyst

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Palo Alto Networks NetSec-Analyst Practice Test 98

Question 970

An operations review at a university network has corrected: A Command Center view shows a surge in risky traffic after an acquisition and the analyst assumes the former company's firewall was compromised. Which observation specifically confirms success?

  1. The responsible users/applications and matching policy are identified for targeted investigation.
  2. Each batch has verified application outcomes and restored controls if a legitimate flow was impacted.
  3. Approved apps continue functioning while previously unneeded applications fail negative tests.
  4. A normalized comparison distinguishes added managed traffic from true per-site risk growth.

Explanation

Correct Answer

D:

A normalized comparison distinguishes added managed traffic from true per-site risk growth. This evidence directly tests the intended corrective action: Correlate the onboarding date, new device coverage and comparable baseline before escalating a breach claim. It confirms the failure mechanism—Telemetry population changes can distort aggregate posture metrics.—has been addressed in the actual affected flow.

Incorrect Answers

A:

The responsible users/applications and matching policy are identified for targeted investigation. This would verify resolution of a different case: A branch's Activity Insights show repeated traffic to suspicious hosting sites, but the SOC reviews only destination port counts. It does not show that the reported issue was fixed or that its intended action—Correlate the onboarding date, new device coverage and comparable baseline before escalating a breach claim.—worked.

B:

Each batch has verified application outcomes and restored controls if a legitimate flow was impacted. This would verify resolution of a different case: A company uses Policy Optimizer findings to disable 50 rules at once without a rollback plan, disrupting regional month-end processing. It does not show that the reported issue was fixed or that its intended action—Correlate the onboarding date, new device coverage and comparable baseline before escalating a breach claim.—worked.

C:

Approved apps continue functioning while previously unneeded applications fail negative tests. This would verify resolution of a different case: A broad any-application allow has observed only three sanctioned App-IDs for several weeks, but operations continues allowing all applications. It does not show that the reported issue was fixed or that its intended action—Correlate the onboarding date, new device coverage and comparable baseline before escalating a breach claim.—worked.

Question 971

At a university network, investigators observe: A Command Center view shows a surge in risky traffic after an acquisition and the analyst assumes the former company's firewall was compromised. Which underlying policy or system mechanism BEST explains this behavior?

  1. Telemetry population changes can distort aggregate posture metrics.
  2. Low recent hit counts do not prove a rule will never be needed for periodic applications.
  3. Global averages can mask local exposures and outliers.
  4. An Any application allow grants more capability than the observed legitimate workload.

Explanation

Correct Answer

A:

Telemetry population changes can distort aggregate posture metrics. This explains why the reported condition occurs: A Command Center view shows a surge in risky traffic after an acquisition and the analyst assumes the former company's firewall was compromised. The targeted correction is: Correlate the onboarding date, new device coverage and comparable baseline before escalating a breach claim.

Incorrect Answers

B:

Low recent hit counts do not prove a rule will never be needed for periodic applications. This mechanism instead explains a separate problem: Policy Optimizer lists an unused Security rule, but an admin deletes it immediately without checking scheduled business traffic dependencies. The current incident requires the more directly applicable cause stated by the correct option.

C:

Global averages can mask local exposures and outliers. This mechanism instead explains a separate problem: A manager sees one global Activity Insights aggregate and misses unusually risky traffic from a single retail branch. The current incident requires the more directly applicable cause stated by the correct option.

D:

An Any application allow grants more capability than the observed legitimate workload. This mechanism instead explains a separate problem: A broad any-application allow has observed only three sanctioned App-IDs for several weeks, but operations continues allowing all applications. The current incident requires the more directly applicable cause stated by the correct option.

Question 972

An operations group at a university network resolved: A Command Center view shows a surge in risky traffic after an acquisition and the analyst assumes the former company's firewall was compromised. Which ongoing safeguard should become part of its change process?

  1. Normalize posture trends by traffic cohorts and exposure scope.
  2. Annotate onboarding and deployment changes in trend analyses.
  3. Use multidimensional app, user, URL and device filters for suspicious traffic review.
  4. Include application and policy risk reviews in posture reporting.

Explanation

Correct Answer

B:

Annotate onboarding and deployment changes in trend analyses. This control reduces recurrence of the documented mechanism: Telemetry population changes can distort aggregate posture metrics. It creates a repeatable check around the needed response: Correlate the onboarding date, new device coverage and comparable baseline before escalating a breach claim.

Incorrect Answers

A:

Normalize posture trends by traffic cohorts and exposure scope. That safeguard addresses another potential failure: An engineer uses only a count of blocked threats as a posture score and ignores changing application usage and user populations. It is not the most targeted recurring control for the described cause: Telemetry population changes can distort aggregate posture metrics.

C:

Use multidimensional app, user, URL and device filters for suspicious traffic review. That safeguard addresses another potential failure: A branch's Activity Insights show repeated traffic to suspicious hosting sites, but the SOC reviews only destination port counts. It is not the most targeted recurring control for the described cause: Telemetry population changes can distort aggregate posture metrics.

D:

Include application and policy risk reviews in posture reporting. That safeguard addresses another potential failure: An analyst reviews SCM Command Center and sees healthy devices, then declares security posture acceptable without examining discovered risky applications. It is not the most targeted recurring control for the described cause: Telemetry population changes can distort aggregate posture metrics.

Question 973

At a hospital campus, a security analyst is reviewing this failure during a configuration rollout: A factory adds an approved firmware update service for sensors but its restrictive IoT policy blocks all outbound DNS. What is the MOST appropriate FIRST corrective step?

  1. Attach or apply the appropriate IoT enforcement policy under supported feature and license conditions.
  2. Correct overlapping groups and associate the device with the proper IoT security profile or policy.
  3. Restore supported telemetry connectivity and review classification age before making major enforcement changes.
  4. Allow necessary controlled DNS and update dependencies without broad Internet access.

Explanation

Correct Answer

D:

Allow necessary controlled DNS and update dependencies without broad Internet access. This is the most direct response to the stated incident: A factory adds an approved firmware update service for sensors but its restrictive IoT policy blocks all outbound DNS. The technical mechanism is: Overly narrow application lists can omit essential service dependencies for IoT devices. Confirmation requires: Sensors resolve and reach only the approved update service, and other egress remains blocked.

Incorrect Answers

A:

Attach or apply the appropriate IoT enforcement policy under supported feature and license conditions. That could address a different issue in the same blueprint area: An IoT Security profile is created with a block recommendation but is never associated with traffic-serving device policies. It does not directly correct the given incident, whose decisive mechanism is: Overly narrow application lists can omit essential service dependencies for IoT devices.

B:

Correct overlapping groups and associate the device with the proper IoT security profile or policy. That could address a different issue in the same blueprint area: A new OT sensor appears in a previously trusted device group because a broad address object overlaps its industrial subnet. It does not directly correct the given incident, whose decisive mechanism is: Overly narrow application lists can omit essential service dependencies for IoT devices.

C:

Restore supported telemetry connectivity and review classification age before making major enforcement changes. That could address a different issue in the same blueprint area: A remote plant's IoT classification stops updating after cloud telemetry is blocked, but analysts treat old classifications as current. It does not directly correct the given incident, whose decisive mechanism is: Overly narrow application lists can omit essential service dependencies for IoT devices.

Question 974

During follow-up testing at a hospital campus, the original fault was: A factory adds an approved firmware update service for sensors but its restrictive IoT policy blocks all outbound DNS. Which measured result demonstrates recovery rather than an unrelated improvement?

  1. Sensors resolve and reach only the approved update service, and other egress remains blocked.
  2. A controlled camera cannot access PLC management while its permitted video transport continues.
  3. A safe negative flow from the controlled IoT class is denied by the effective policy.
  4. Representative medical telemetry remains functional while prohibited access is denied.

Explanation

Correct Answer

A:

Sensors resolve and reach only the approved update service, and other egress remains blocked. This evidence directly tests the intended corrective action: Allow necessary controlled DNS and update dependencies without broad Internet access. It confirms the failure mechanism—Overly narrow application lists can omit essential service dependencies for IoT devices.—has been addressed in the actual affected flow.

Incorrect Answers

B:

A controlled camera cannot access PLC management while its permitted video transport continues. This would verify resolution of a different case: An IoT security team enables device discovery but expects that identification by itself denies lateral movement to industrial PLCs. It does not show that the reported issue was fixed or that its intended action—Allow necessary controlled DNS and update dependencies without broad Internet access.—worked.

C:

A safe negative flow from the controlled IoT class is denied by the effective policy. This would verify resolution of a different case: An IoT Security profile is created with a block recommendation but is never associated with traffic-serving device policies. It does not show that the reported issue was fixed or that its intended action—Allow necessary controlled DNS and update dependencies without broad Internet access.—worked.

D:

Representative medical telemetry remains functional while prohibited access is denied. This would verify resolution of a different case: A medical device's IoT recommendation is accepted for every subnet without examining traffic dependencies for life-critical monitoring. It does not show that the reported issue was fixed or that its intended action—Allow necessary controlled DNS and update dependencies without broad Internet access.—worked.

Question 975

The incident investigation at a hospital campus records: A factory adds an approved firmware update service for sensors but its restrictive IoT policy blocks all outbound DNS. Which mechanism provides the strongest explanation?

  1. Discovery and risk assessment are distinct from traffic enforcement.
  2. Overly narrow application lists can omit essential service dependencies for IoT devices.
  3. Automatically broad application of recommendations can interrupt specialized medical traffic.
  4. IP recycling can make stale device-based policy exceptions authorize the wrong asset.

Explanation

Correct Answer

B:

Overly narrow application lists can omit essential service dependencies for IoT devices. This explains why the reported condition occurs: A factory adds an approved firmware update service for sensors but its restrictive IoT policy blocks all outbound DNS. The targeted correction is: Allow necessary controlled DNS and update dependencies without broad Internet access.

Incorrect Answers

A:

Discovery and risk assessment are distinct from traffic enforcement. This mechanism instead explains a separate problem: An IoT security team enables device discovery but expects that identification by itself denies lateral movement to industrial PLCs. The current incident requires the more directly applicable cause stated by the correct option.

C:

Automatically broad application of recommendations can interrupt specialized medical traffic. This mechanism instead explains a separate problem: A medical device's IoT recommendation is accepted for every subnet without examining traffic dependencies for life-critical monitoring. The current incident requires the more directly applicable cause stated by the correct option.

D:

IP recycling can make stale device-based policy exceptions authorize the wrong asset. This mechanism instead explains a separate problem: A wireless asset sensor is decommissioned but remains included in an IoT allow-list after its address is reassigned to a contractor laptop. The current incident requires the more directly applicable cause stated by the correct option.

Question 976

After a corrective change at a hospital campus, the team documents: A factory adds an approved firmware update service for sensors but its restrictive IoT policy blocks all outbound DNS. Which repeatable control BEST prevents a recurrence?

  1. Monitor IoT inventory freshness and classification confidence.
  2. Require clinical signoff and monitored rollout for medical IoT changes.
  3. Record device update and name-resolution flows in each IoT access baseline.
  4. Audit address overlaps when adding new operational technology segments.

Explanation

Correct Answer

C:

Record device update and name-resolution flows in each IoT access baseline. This control reduces recurrence of the documented mechanism: Overly narrow application lists can omit essential service dependencies for IoT devices. It creates a repeatable check around the needed response: Allow necessary controlled DNS and update dependencies without broad Internet access.

Incorrect Answers

A:

Monitor IoT inventory freshness and classification confidence. That safeguard addresses another potential failure: A remote plant's IoT classification stops updating after cloud telemetry is blocked, but analysts treat old classifications as current. It is not the most targeted recurring control for the described cause: Overly narrow application lists can omit essential service dependencies for IoT devices.

B:

Require clinical signoff and monitored rollout for medical IoT changes. That safeguard addresses another potential failure: A medical device's IoT recommendation is accepted for every subnet without examining traffic dependencies for life-critical monitoring. It is not the most targeted recurring control for the described cause: Overly narrow application lists can omit essential service dependencies for IoT devices.

D:

Audit address overlaps when adding new operational technology segments. That safeguard addresses another potential failure: A new OT sensor appears in a previously trusted device group because a broad address object overlaps its industrial subnet. It is not the most targeted recurring control for the described cause: Overly narrow application lists can omit essential service dependencies for IoT devices.

Question 977

During a quarterly compliance review at a retail network, analysts observe: A route-based VPN design requires one application to use a tunnel, but an engineer selects the public egress interface in the matching PBF action. Which Palo Alto Networks configuration or investigation action BEST corrects the identified issue?

  1. Correct the intended tunnel interface or monitored next hop according to the approved VPN topology.
  2. Correct the PBF rule's source interface or zone and match criteria for the observed incoming flow.
  3. Repair the authorized next-hop reachability or interface route before enabling the policy.
  4. Limit the PBF match to the specific approved source networks, destination addresses and transport services.

Explanation

Correct Answer

A:

Correct the intended tunnel interface or monitored next hop according to the approved VPN topology. This is the most direct response to the stated incident: A route-based VPN design requires one application to use a tunnel, but an engineer selects the public egress interface in the matching PBF action. The technical mechanism is: PBF forwarding actions can override normal routing and force an undesired path. Confirmation requires: Test application traffic traverses the authenticated tunnel and cannot leak through direct Internet.

Incorrect Answers

B:

Correct the PBF rule's source interface or zone and match criteria for the observed incoming flow. That could address a different issue in the same blueprint area: A WAN migration uses a PBF rule to direct payment traffic to ISP-A, but the rule matches the wrong ingress interface and all traffic follows regular routes. It does not directly correct the given incident, whose decisive mechanism is: PBF forwarding actions can override normal routing and force an undesired path.

C:

Repair the authorized next-hop reachability or interface route before enabling the policy. That could address a different issue in the same blueprint area: The PBF rule is deployed to a firewall that has no reachable next-hop route for the configured forwarding address. It does not directly correct the given incident, whose decisive mechanism is: PBF forwarding actions can override normal routing and force an undesired path.

D:

Limit the PBF match to the specific approved source networks, destination addresses and transport services. That could address a different issue in the same blueprint area: An organization uses PBF to steer security tools but omits intended source and service criteria, sending all branch telemetry through a costly link. It does not directly correct the given incident, whose decisive mechanism is: PBF forwarding actions can override normal routing and force an undesired path.

Question 978

At a retail network, a test team is validating a change after this incident: A route-based VPN design requires one application to use a tunnel, but an engineer selects the public egress interface in the matching PBF action. What evidence most directly verifies the intended outcome?

  1. Traffic follows the correct target-site path without referencing nonexistent source-site interfaces.
  2. Test application traffic traverses the authenticated tunnel and cannot leak through direct Internet.
  3. User sessions follow the intended path and management reachability remains stable.
  4. Only authorized telemetry flows use the expensive link under observed session tests.

Explanation

Correct Answer

B:

Test application traffic traverses the authenticated tunnel and cannot leak through direct Internet. This evidence directly tests the intended corrective action: Correct the intended tunnel interface or monitored next hop according to the approved VPN topology. It confirms the failure mechanism—PBF forwarding actions can override normal routing and force an undesired path.—has been addressed in the actual affected flow.

Incorrect Answers

A:

Traffic follows the correct target-site path without referencing nonexistent source-site interfaces. This would verify resolution of a different case: An administrator copies a PBF rule to a second firewall but its egress interface names and next-hop topology differ from the source site. It does not show that the reported issue was fixed or that its intended action—Correct the intended tunnel interface or monitored next hop according to the approved VPN topology.—worked.

C:

User sessions follow the intended path and management reachability remains stable. This would verify resolution of a different case: A PBF redirect meant only for outbound customer traffic accidentally captures firewall-management communications from an overlapping source subnet. It does not show that the reported issue was fixed or that its intended action—Correct the intended tunnel interface or monitored next hop according to the approved VPN topology.—worked.

D:

Only authorized telemetry flows use the expensive link under observed session tests. This would verify resolution of a different case: An organization uses PBF to steer security tools but omits intended source and service criteria, sending all branch telemetry through a costly link. It does not show that the reported issue was fixed or that its intended action—Correct the intended tunnel interface or monitored next hop according to the approved VPN topology.—worked.

Question 979

A network security analyst at a retail network is assessing: A route-based VPN design requires one application to use a tunnel, but an engineer selects the public egress interface in the matching PBF action. What is the most relevant root cause?

  1. Existing session state may retain previous forwarding decisions during policy transitions.
  2. Broad source and service matching causes unintended path steering and cost.
  3. PBF forwarding actions can override normal routing and force an undesired path.
  4. Policy-based forwarding selects paths; NAT transforms addresses.

Explanation

Correct Answer

C:

PBF forwarding actions can override normal routing and force an undesired path. This explains why the reported condition occurs: A route-based VPN design requires one application to use a tunnel, but an engineer selects the public egress interface in the matching PBF action. The targeted correction is: Correct the intended tunnel interface or monitored next hop according to the approved VPN topology.

Incorrect Answers

A:

Existing session state may retain previous forwarding decisions during policy transitions. This mechanism instead explains a separate problem: A PBF exception routes only new sessions after a change but analysts expect established stateful sessions to immediately use the new path. The current incident requires the more directly applicable cause stated by the correct option.

B:

Broad source and service matching causes unintended path steering and cost. This mechanism instead explains a separate problem: An organization uses PBF to steer security tools but omits intended source and service criteria, sending all branch telemetry through a costly link. The current incident requires the more directly applicable cause stated by the correct option.

D:

Policy-based forwarding selects paths; NAT transforms addresses. This mechanism instead explains a separate problem: A branch administrator tries to use PBF to translate source addresses for a partner, expecting routing policy to replace NAT. The current incident requires the more directly applicable cause stated by the correct option.

Question 980

A risk review at a retail network focuses on preventing this issue again: A route-based VPN design requires one application to use a tunnel, but an engineer selects the public egress interface in the matching PBF action. Which recurring control is most suitable?

  1. Review PBF utilization and match criteria for approved transport services monthly.
  2. Include next-hop and ARP/ND reachability tests in PBF preflight.
  3. Document and test routing and translation as separate policy layers.
  4. Run tunnel outage and leak-prevention tests on all application VPN exceptions.

Explanation

Correct Answer

D:

Run tunnel outage and leak-prevention tests on all application VPN exceptions. This control reduces recurrence of the documented mechanism: PBF forwarding actions can override normal routing and force an undesired path. It creates a repeatable check around the needed response: Correct the intended tunnel interface or monitored next hop according to the approved VPN topology.

Incorrect Answers

A:

Review PBF utilization and match criteria for approved transport services monthly. That safeguard addresses another potential failure: An organization uses PBF to steer security tools but omits intended source and service criteria, sending all branch telemetry through a costly link. It is not the most targeted recurring control for the described cause: PBF forwarding actions can override normal routing and force an undesired path.

B:

Include next-hop and ARP/ND reachability tests in PBF preflight. That safeguard addresses another potential failure: The PBF rule is deployed to a firewall that has no reachable next-hop route for the configured forwarding address. It is not the most targeted recurring control for the described cause: PBF forwarding actions can override normal routing and force an undesired path.

C:

Document and test routing and translation as separate policy layers. That safeguard addresses another potential failure: A branch administrator tries to use PBF to translate source addresses for a partner, expecting routing policy to replace NAT. It is not the most targeted recurring control for the described cause: PBF forwarding actions can override normal routing and force an undesired path.

Palo Alto Networks Certified Network Security Analyst (NetSec-Analyst) Practice Tests