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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 23

Question 220

An operations group at a manufacturing plant resolved: A risk manager wants to apply a critical deny to all branches but an engineer edits only a single device-specific configuration scope. Which ongoing safeguard should become part of its change process?

  1. Review target inventory and parent-folder expansion on every push.
  2. Validate intended blast radius and push population for shared changes.
  3. Enforce review of pending multi-admin changes before deployment.
  4. Require target-device push confirmation during security change closure.

Explanation

Correct Answer

B:

Validate intended blast radius and push population for shared changes. This control reduces recurrence of the documented mechanism: Local scope does not automatically propagate to peers in other folders. It creates a repeatable check around the needed response: Implement the approved global/folder policy at the correct shared scope and test a limited rollout before full push.

Incorrect Answers

A:

Review target inventory and parent-folder expansion on every push. That safeguard addresses another potential failure: A branch policy is correctly edited in a shared parent folder, but the analyst selects a test firewall rather than the intended production group for the push. It is not the most targeted recurring control for the described cause: Local scope does not automatically propagate to peers in other folders.

C:

Enforce review of pending multi-admin changes before deployment. That safeguard addresses another potential failure: Two incident responders edit the same firewall configuration in SCM and only the second person's proposed change appears in a deployment preview. It is not the most targeted recurring control for the described cause: Local scope does not automatically propagate to peers in other folders.

D:

Require target-device push confirmation during security change closure. That safeguard addresses another potential failure: An administrator saves a security change in Strata Cloud Manager and tells incident responders it is live without pushing configuration to the target NGFW. It is not the most targeted recurring control for the described cause: Local scope does not automatically propagate to peers in other folders.

Question 221

At a corporate headquarters, a security analyst is reviewing this failure during a planned policy migration: A site reports SSH management failure while ping succeeds and a technician assumes the firewall is down. What is the MOST appropriate FIRST corrective step?

  1. Read the effective running policy and pending changes for the specific target before diagnosis.
  2. Inspect effective scope and variable/object overrides, then correct the intended target-specific value.
  3. Inspect Decryption logs and certificate verification to correct the narrow trust or compatibility fault.
  4. Check permitted management service access, authorized administrator roles and interface profiles.

Explanation

Correct Answer

D:

Check permitted management service access, authorized administrator roles and interface profiles. This is the most direct response to the stated incident: A site reports SSH management failure while ping succeeds and a technician assumes the firewall is down. The technical mechanism is: Basic reachability and availability of a specific management service are distinct controls. Confirmation requires: Authorized SSH access is restored while disallowed sources remain blocked.

Incorrect Answers

A:

Read the effective running policy and pending changes for the specific target before diagnosis. That could address a different issue in the same blueprint area: A security group sees a failed policy test but compares the cloud candidate object value rather than the running configuration on the firewall. It does not directly correct the given incident, whose decisive mechanism is: Basic reachability and availability of a specific management service are distinct controls.

B:

Inspect effective scope and variable/object overrides, then correct the intended target-specific value. That could address a different issue in the same blueprint area: A branch security policy appears in the shared SCM folder but the target firewall still uses a different locally overridden address object. It does not directly correct the given incident, whose decisive mechanism is: Basic reachability and availability of a specific management service are distinct controls.

C:

Inspect Decryption logs and certificate verification to correct the narrow trust or compatibility fault. That could address a different issue in the same blueprint area: An administrator uses a broad decryption bypass as a workaround for a TLS handshake error without confirming the server certificate chain. It does not directly correct the given incident, whose decisive mechanism is: Basic reachability and availability of a specific management service are distinct controls.

Question 222

During follow-up testing at a corporate headquarters, the original fault was: A site reports SSH management failure while ping succeeds and a technician assumes the firewall is down. Which measured result demonstrates recovery rather than an unrelated improvement?

  1. Authorized SSH access is restored while disallowed sources remain blocked.
  2. The matching session hits the expected rule using the approved resolved address object.
  3. A benign listed address is present on-device and hits the intended rule after refresh.
  4. The client connects under the approved inspection mode and unrelated TLS remains inspected.

Explanation

Correct Answer

A:

Authorized SSH access is restored while disallowed sources remain blocked. This evidence directly tests the intended corrective action: Check permitted management service access, authorized administrator roles and interface profiles. It confirms the failure mechanism—Basic reachability and availability of a specific management service are distinct controls.—has been addressed in the actual affected flow.

Incorrect Answers

B:

The matching session hits the expected rule using the approved resolved address object. This would verify resolution of a different case: A branch security policy appears in the shared SCM folder but the target firewall still uses a different locally overridden address object. It does not show that the reported issue was fixed or that its intended action—Check permitted management service access, authorized administrator roles and interface profiles.—worked.

C:

A benign listed address is present on-device and hits the intended rule after refresh. This would verify resolution of a different case: A branch's dynamic EDL block appears configured in SCM but the device still accepts the indicator because the last feed refresh failed. It does not show that the reported issue was fixed or that its intended action—Check permitted management service access, authorized administrator roles and interface profiles.—worked.

D:

The client connects under the approved inspection mode and unrelated TLS remains inspected. This would verify resolution of a different case: An administrator uses a broad decryption bypass as a workaround for a TLS handshake error without confirming the server certificate chain. It does not show that the reported issue was fixed or that its intended action—Check permitted management service access, authorized administrator roles and interface profiles.—worked.

Question 223

The incident investigation at a corporate headquarters records: A site reports SSH management failure while ping succeeds and a technician assumes the firewall is down. Which mechanism provides the strongest explanation?

  1. Correct application authorization does not ensure valid translation or routing.
  2. Basic reachability and availability of a specific management service are distinct controls.
  3. Same-name object collisions can invalidate or override effective configuration.
  4. Destination NAT success does not guarantee correct routing-derived zone matching.

Explanation

Correct Answer

B:

Basic reachability and availability of a specific management service are distinct controls. This explains why the reported condition occurs: A site reports SSH management failure while ping succeeds and a technician assumes the firewall is down. The targeted correction is: Check permitted management service access, authorized administrator roles and interface profiles.

Incorrect Answers

A:

Correct application authorization does not ensure valid translation or routing. This mechanism instead explains a separate problem: After an ISP change, outbound sessions fail but a Security log shows the proper allow rule and application, so the analyst keeps changing App-ID settings. The current incident requires the more directly applicable cause stated by the correct option.

C:

Same-name object collisions can invalidate or override effective configuration. This mechanism instead explains a separate problem: A newly configured address object is referenced by a rule but the selected target device rejects the policy because another inherited object uses a conflicting name. The current incident requires the more directly applicable cause stated by the correct option.

D:

Destination NAT success does not guarantee correct routing-derived zone matching. This mechanism instead explains a separate problem: An analyst sees a traffic denial for an internal web server but its destination NAT is correct; route lookup selects the wrong destination zone due to an old route. The current incident requires the more directly applicable cause stated by the correct option.

Question 224

After a corrective change at a corporate headquarters, the team documents: A site reports SSH management failure while ping succeeds and a technician assumes the firewall is down. Which repeatable control BEST prevents a recurrence?

  1. Require NAT and return-path verification in ISP migration closeout.
  2. Update zone-specific policy tests whenever tunnel routing changes.
  3. Test the exact management protocol and source ACL after management changes.
  4. Record candidate/running revision IDs in troubleshooting notes.

Explanation

Correct Answer

C:

Test the exact management protocol and source ACL after management changes. This control reduces recurrence of the documented mechanism: Basic reachability and availability of a specific management service are distinct controls. It creates a repeatable check around the needed response: Check permitted management service access, authorized administrator roles and interface profiles.

Incorrect Answers

A:

Require NAT and return-path verification in ISP migration closeout. That safeguard addresses another potential failure: After an ISP change, outbound sessions fail but a Security log shows the proper allow rule and application, so the analyst keeps changing App-ID settings. It is not the most targeted recurring control for the described cause: Basic reachability and availability of a specific management service are distinct controls.

B:

Update zone-specific policy tests whenever tunnel routing changes. That safeguard addresses another potential failure: An analyst troubleshoots denied traffic by checking only the application port but ignores that the destination zone changed due to a tunnel migration. It is not the most targeted recurring control for the described cause: Basic reachability and availability of a specific management service are distinct controls.

D:

Record candidate/running revision IDs in troubleshooting notes. That safeguard addresses another potential failure: A security group sees a failed policy test but compares the cloud candidate object value rather than the running configuration on the firewall. It is not the most targeted recurring control for the described cause: Basic reachability and availability of a specific management service are distinct controls.

Question 225

During a security audit at a distributed branch estate, analysts observe: A payment application uses certificate pinning and fails only where forward-proxy decryption is applied although the compliance design allows a narrow exception. Which Palo Alto Networks configuration or investigation action BEST corrects the identified issue?

  1. Create a specifically scoped No Decrypt policy exception for the approved destination and document the risk.
  2. Use the supported SSL Inbound Inspection configuration with the authorized server certificate and matching policy.
  3. Correct the Decryption policy match zones and addresses, and associate the intended profile with the rule.
  4. Apply the approved minimum supported TLS and cipher settings in the relevant profile, respecting compatibility requirements.

Explanation

Correct Answer

A:

Create a specifically scoped No Decrypt policy exception for the approved destination and document the risk. This is the most direct response to the stated incident: A payment application uses certificate pinning and fails only where forward-proxy decryption is applied although the compliance design allows a narrow exception. The technical mechanism is: Pinned certificate validation may reject the intermediary certificate created by forward proxy. Confirmation requires: The approved payment application succeeds and other eligible TLS sessions remain decrypted.

Incorrect Answers

B:

Use the supported SSL Inbound Inspection configuration with the authorized server certificate and matching policy. That could address a different issue in the same blueprint area: An organization needs to inspect inbound HTTPS for an owned public server but configures SSL Forward Proxy instead of the appropriate inbound certificate-based model. It does not directly correct the given incident, whose decisive mechanism is: Pinned certificate validation may reject the intermediary certificate created by forward proxy.

C:

Correct the Decryption policy match zones and addresses, and associate the intended profile with the rule. That could address a different issue in the same blueprint area: An analyst adds a Decryption profile but leaves the governing Decryption policy scoped to a different destination zone, resulting in no decryption for the tested traffic. It does not directly correct the given incident, whose decisive mechanism is: Pinned certificate validation may reject the intermediary certificate created by forward proxy.

D:

Apply the approved minimum supported TLS and cipher settings in the relevant profile, respecting compatibility requirements. That could address a different issue in the same blueprint area: A security group permits obsolete TLS cryptographic behavior because the Decryption profile has no protocol-version restrictions. It does not directly correct the given incident, whose decisive mechanism is: Pinned certificate validation may reject the intermediary certificate created by forward proxy.

Question 226

At a distributed branch estate, a test team is validating a change after this incident: A payment application uses certificate pinning and fails only where forward-proxy decryption is applied although the compliance design allows a narrow exception. What evidence most directly verifies the intended outcome?

  1. Managed clients validate the intercepted TLS certificates while the firewall performs intended inspection.
  2. The approved payment application succeeds and other eligible TLS sessions remain decrypted.
  3. A controlled invalid-chain site is handled according to the configured block or log requirement.
  4. Session and decryption logs show the test flow matching the correct policy and inspection behavior.

Explanation

Correct Answer

B:

The approved payment application succeeds and other eligible TLS sessions remain decrypted. This evidence directly tests the intended corrective action: Create a specifically scoped No Decrypt policy exception for the approved destination and document the risk. It confirms the failure mechanism—Pinned certificate validation may reject the intermediary certificate created by forward proxy.—has been addressed in the actual affected flow.

Incorrect Answers

A:

Managed clients validate the intercepted TLS certificates while the firewall performs intended inspection. This would verify resolution of a different case: TLS forward-proxy clients show certificate trust warnings immediately after an organization enables outbound decryption with a locally generated signing certificate. It does not show that the reported issue was fixed or that its intended action—Create a specifically scoped No Decrypt policy exception for the approved destination and document the risk.—worked.

C:

A controlled invalid-chain site is handled according to the configured block or log requirement. This would verify resolution of a different case: A branch TLS inspection setup accepts connections to servers with invalid certificates because the Decryption profile uses a permissive server-certificate failure action. It does not show that the reported issue was fixed or that its intended action—Create a specifically scoped No Decrypt policy exception for the approved destination and document the risk.—worked.

D:

Session and decryption logs show the test flow matching the correct policy and inspection behavior. This would verify resolution of a different case: An analyst adds a Decryption profile but leaves the governing Decryption policy scoped to a different destination zone, resulting in no decryption for the tested traffic. It does not show that the reported issue was fixed or that its intended action—Create a specifically scoped No Decrypt policy exception for the approved destination and document the risk.—worked.

Question 227

A network security analyst at a distributed branch estate is assessing: A payment application uses certificate pinning and fails only where forward-proxy decryption is applied although the compliance design allows a narrow exception. What is the most relevant root cause?

  1. A profile's certificate-validation actions determine whether untrusted server sessions proceed.
  2. Decryption certificate lifecycle spans firewall signing material and client-side trust distribution.
  3. Pinned certificate validation may reject the intermediary certificate created by forward proxy.
  4. Forward-proxy re-signing needs a trust chain that endpoints accept.

Explanation

Correct Answer

C:

Pinned certificate validation may reject the intermediary certificate created by forward proxy. This explains why the reported condition occurs: A payment application uses certificate pinning and fails only where forward-proxy decryption is applied although the compliance design allows a narrow exception. The targeted correction is: Create a specifically scoped No Decrypt policy exception for the approved destination and document the risk.

Incorrect Answers

A:

A profile's certificate-validation actions determine whether untrusted server sessions proceed. This mechanism instead explains a separate problem: A branch TLS inspection setup accepts connections to servers with invalid certificates because the Decryption profile uses a permissive server-certificate failure action. The current incident requires the more directly applicable cause stated by the correct option.

B:

Decryption certificate lifecycle spans firewall signing material and client-side trust distribution. This mechanism instead explains a separate problem: A certificate renewal for the firewall's decryption trust infrastructure is completed, but endpoint trust stores still contain only the retired issuer. The current incident requires the more directly applicable cause stated by the correct option.

D:

Forward-proxy re-signing needs a trust chain that endpoints accept. This mechanism instead explains a separate problem: TLS forward-proxy clients show certificate trust warnings immediately after an organization enables outbound decryption with a locally generated signing certificate. The current incident requires the more directly applicable cause stated by the correct option.

Question 228

A risk review at a distributed branch estate focuses on preventing this issue again: A payment application uses certificate pinning and fails only where forward-proxy decryption is applied although the compliance design allows a narrow exception. Which recurring control is most suitable?

  1. Audit object memberships behind all high-impact No Decrypt entries.
  2. Test certificate distribution and trust before enabling decryption for new device cohorts.
  3. Include invalid-chain, expired-certificate and revoked-certificate checks in decryption testing.
  4. Review decryption exclusions for business owner, destination scope and expiration.

Explanation

Correct Answer

D:

Review decryption exclusions for business owner, destination scope and expiration. This control reduces recurrence of the documented mechanism: Pinned certificate validation may reject the intermediary certificate created by forward proxy. It creates a repeatable check around the needed response: Create a specifically scoped No Decrypt policy exception for the approved destination and document the risk.

Incorrect Answers

A:

Audit object memberships behind all high-impact No Decrypt entries. That safeguard addresses another potential failure: An administrator excludes a medical service from decryption with an address object that includes adjacent unrelated business hosts. It is not the most targeted recurring control for the described cause: Pinned certificate validation may reject the intermediary certificate created by forward proxy.

B:

Test certificate distribution and trust before enabling decryption for new device cohorts. That safeguard addresses another potential failure: TLS forward-proxy clients show certificate trust warnings immediately after an organization enables outbound decryption with a locally generated signing certificate. It is not the most targeted recurring control for the described cause: Pinned certificate validation may reject the intermediary certificate created by forward proxy.

C:

Include invalid-chain, expired-certificate and revoked-certificate checks in decryption testing. That safeguard addresses another potential failure: A branch TLS inspection setup accepts connections to servers with invalid certificates because the Decryption profile uses a permissive server-certificate failure action. It is not the most targeted recurring control for the described cause: Pinned certificate validation may reject the intermediary certificate created by forward proxy.

Question 229

During an incident triage, an administrator reports at a research campus: A datacenter denies all east-west traffic based on broad zones, unintentionally disrupting a necessary monitored backup application. What should the team change or investigate FIRST?

  1. Restore the supported identity mapping source and verify group membership before widening the rule.
  2. Create a narrow high-priority permit for the documented backup App-ID and destination, with security profiles, above the segment deny.
  3. Correct identity deprovisioning, refresh mappings and test policy enforcement for the former user.
  4. Interpret Security policy denial separately from layer-7 scanning and rely on appropriate deny logs for attempted access.

Explanation

Correct Answer

B:

Create a narrow high-priority permit for the documented backup App-ID and destination, with security profiles, above the segment deny. This is the most direct response to the stated incident: A datacenter denies all east-west traffic based on broad zones, unintentionally disrupting a necessary monitored backup application. The technical mechanism is: Broad segmentation policy needs explicit reviewed exceptions for business dependencies. Confirmation requires: Only required backup transfers succeed and unauthorized lateral flows remain denied.

Incorrect Answers

A:

Restore the supported identity mapping source and verify group membership before widening the rule. That could address a different issue in the same blueprint area: A contractor's User-ID group is used on a permit rule but the firewall has no current user-to-IP mapping for VPN clients. It does not directly correct the given incident, whose decisive mechanism is: Broad segmentation policy needs explicit reviewed exceptions for business dependencies.

C:

Correct identity deprovisioning, refresh mappings and test policy enforcement for the former user. That could address a different issue in the same blueprint area: A user group rule is unexpectedly hit by a former employee whose cached identity mapping has not expired after offboarding. It does not directly correct the given incident, whose decisive mechanism is: Broad segmentation policy needs explicit reviewed exceptions for business dependencies.

D:

Interpret Security policy denial separately from layer-7 scanning and rely on appropriate deny logs for attempted access. That could address a different issue in the same blueprint area: A team expects a Security profile to inspect traffic blocked by a deny rule, but the incident report shows no content inspection of dropped packets. It does not directly correct the given incident, whose decisive mechanism is: Broad segmentation policy needs explicit reviewed exceptions for business dependencies.

Question 230

Following remediation at a research campus, engineers revisit: A datacenter denies all east-west traffic based on broad zones, unintentionally disrupting a necessary monitored backup application. Which observation would BEST prove the specific issue is resolved?

  1. Only the approved payroll application connects and unrelated web services to that host remain blocked.
  2. The legitimate management session succeeds with the prescribed threat inspection/logging.
  3. Only required backup transfers succeed and unauthorized lateral flows remain denied.
  4. The safe denied flow remains blocked and its rule and traffic disposition are observable without claiming payload inspection.

Explanation

Correct Answer

C:

Only required backup transfers succeed and unauthorized lateral flows remain denied. This evidence directly tests the intended corrective action: Create a narrow high-priority permit for the documented backup App-ID and destination, with security profiles, above the segment deny. It confirms the failure mechanism—Broad segmentation policy needs explicit reviewed exceptions for business dependencies.—has been addressed in the actual affected flow.

Incorrect Answers

A:

Only the approved payroll application connects and unrelated web services to that host remain blocked. This would verify resolution of a different case: A production Security policy permits the general web-browsing application to an internal payroll server instead of specifying the business application. It does not show that the reported issue was fixed or that its intended action—Create a narrow high-priority permit for the documented backup App-ID and destination, with security profiles, above the segment deny.—worked.

B:

The legitimate management session succeeds with the prescribed threat inspection/logging. This would verify resolution of a different case: A policy permits a documented remote administration application but lacks the required anti-spyware profile despite explicit endpoint-control policy. It does not show that the reported issue was fixed or that its intended action—Create a narrow high-priority permit for the documented backup App-ID and destination, with security profiles, above the segment deny.—worked.

D:

The safe denied flow remains blocked and its rule and traffic disposition are observable without claiming payload inspection. This would verify resolution of a different case: A team expects a Security profile to inspect traffic blocked by a deny rule, but the incident report shows no content inspection of dropped packets. It does not show that the reported issue was fixed or that its intended action—Create a narrow high-priority permit for the documented backup App-ID and destination, with security profiles, above the segment deny.—worked.

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