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Palo Alto Networks Network Security Analyst Sample Questions:

1. An internal messaging application, 'SecureChat', developed in-house, uses a custom TLS implementation on TCP/4444. App-Ld identifies it as 'ssl-generic' or 'unknown-tcp'. The security team wants to classify this as 'secure-chat' (a custom application) to apply a specific decryption profile and advanced threat prevention. They've identified that the application always originates from a specific source network block (10.10.10.0/24) and connects to a backend server farm (172.16.1.0/24). Which of the following statements regarding the implementation and implications of an Application Override for 'SecureChat' are TRUE?

A) Creating an Application Override negates the need for any subsequent security policy, as the traffic is now implicitly allowed and secured.
B) An Application Override for 'SecureChat' on TCP/4444 from 10.10.10.0/24 to 172.16.1.0/24 will cause the firewall to identify this traffic as 'secure-chat' before any App-ID signatures are evaluated for it.
C) If the 'SecureChat' application later changes its port to TCP/8888, the existing Application Override will automatically adapt and continue to identify the traffic correctly.
D) The Application Override rule should be placed at the bottom of the Application Override policy list to ensure all other App-ID rules are considered first.
E) After applying the Application Override, a security policy can explicitly allow 'secure-chat' and apply a dedicated decryption profile and threat prevention, irrespective of App-ID's initial guess.

2. A distributed manufacturing company utilizes several IoT devices across its factories that transmit telemetry data via MQTT to a central cloud broker. The MQTT traffic is highly sensitive to packet loss but can tolerate moderate latency. The company has a mix of Satellite, 4G, and MPLS links at each factory. They want an SD-WAN policy that prioritizes MPLS for MQTT, then 4G, and only uses Satellite as a last resort, unless the Satellite link offers exceptionally low packet loss (below 0.1 %) even if its latency is higher than 4G. If no link meets the packet loss requirement for MQTT (i.e., packet loss on all links exceeds 0.5%), the traffic should be dropped to prevent unreliable data transmission. Which SD-WAN configuration achieves this, considering the complex conditional preference for Satellite?

A) Create an SLA profile for MQTT: 'latency < 200mS, 'packet-loss < 0.5%'. Define three path quality profiles: 'MPLS_Q, '4G_Q, 'Satellite_Q. Configure an SD-WAN policy for MQTT, setting the path preference order: MPLS, 4G, Satellite. Configure the 'Fail Action' to 'Drop'. The system will automatically select the best path based on the SLA and preference.
B) Utilize a single SD-WAN policy for MQTT. Define path quality profiles for MPLS, 4G, and Satellite. Implement a custom health check script that dynamically assigns a 'cost' to each link based on current packet loss and latency. The script should assign a very low cost to Satellite if its packet loss is below 0.1%. The SD-WAN policy will then select the lowest cost path. Configure the policy to drop if no path's cost falls below a threshold.
C) Define two SLA profiles: (packet-loss < 0.5%, latency < 200ms) and (packet-loss < 0.1%, latency unlimited). Create an SD-WAN policy for MQTT. Set a primary path group for MPLS and 4G, using Create a secondary path group for Satellite, using 'MQTT Satellite_Exception_SLA'. Configure a 'Fail Action' of 'Drop' if no path in any group meets its respective SLA.
D) Create an SD-WAN policy for MQTT using 'Dynamic Path Selection'. Define a single SLA profile that prioritizes packet loss over latency. Configure the path preference order for MPLS, then 4G. For Satellite, enable 'Conditional Path Selection' and define a specific condition where Satellite is preferred if its packet loss is below 0.1 overriding the general latency preference. Set the global 'Fail Action' to 'Drop'.
E) Configure an SD-WAN policy for MQTT. create a PBF rule for MQTT traffic that explicitly prefers MPLS, then 4G. create a second PBF rule for MQTT with a lower priority that, under specific conditions (e.g., custom script checking Satellite link quality), forwards traffic to Satellite if its packet loss is below 0.1 %. If no PBF rules are met, rely on a default route to drop traffic.

3. A critical server application relies on a set of custom web services running on non-standard ports. The security team needs to ensure that these specific web services are protected by comprehensive threat prevention, including WildFire analysis, but without impacting the performance of other high-volume, less critical HTTP/S traffic. The firewall must distinguish between these custom services and standard HTTP/S. Which approach offers the most efficient and secure configuration?

A) Configure the existing 'web-browsing' application to include the custom non-standard ports within the service object. Create a security policy rule for this modified 'web-browsing' application, allowing it to the critical server. Apply a comprehensive Security Profile Group (with WildFire) to this rule, and then create a separate, less restrictive policy for general HTTP/S traffic.
B) Define a custom application for each non-standard web service, explicitly identifying its port and application type. Create a dedicated security policy rule for these custom applications, allowing traffic from relevant sources to the critical server. To this rule, attach a Security Profile Group containing Antivirus, Anti-Spyware, Vulnerability Protection, URL Filtering (tuned for web services), File Blocking, and a WildFire Analysis profile configured for all file types.
C) Create a custom application for each specific web service using a signature-based approach or by specifying the application name (e.g., 'web-browsing') with custom ports. Then, create a single security policy rule for all web traffic (HTTP/S and custom services), and apply a comprehensive Security Profile Group (including WildFire) to this rule.
D) Create a service object for each custom port. Define a security policy rule allowing these service objects to the critical server. Apply a Security Profile Group containing Antivirus, Anti-Spyware, Vulnerability Protection, and a WildFire Analysis profile. For standard HTTP/S traffic, apply a separate security policy with a less CPU-intensive Security Profile Group.
E) Utilize policy-based forwarding (PBF) to direct all traffic destined for the critical server through a dedicated Vwire interface. On this Vwire, apply a zone protection profile and a comprehensive Security Profile Group including WildFire. For other HTTP/S traffic, apply standard security policies.

4. Consider a large enterprise using Panorama for managing over 500 Palo Alto Networks firewalls. The security operations team frequently needs to deploy emergency security policy updates, which involve adding new URL filtering categories and threat prevention profiles to a subset of firewalls. Due to the critical nature, these updates must be atomic and reversible. Which of the following strategies, leveraging Panorama's folder and snippet capabilities, would best meet these requirements while minimizing downtime and human error?

A) Create a 'Shared Emergency Snippet' containing the required URL filtering and threat profiles. Apply this snippet to the relevant Device Groups as a 'Shared' policy rule. To revert, remove the shared snippet reference from the policy rule.
B) Use a Python script with the Panorama API to programmatically add and remove the emergency policies. Store the policy definitions as code (snippets) in a version control system.
C) Manually create new policy rules in each affected Device Group and then commit and push. To revert, manually remove them.
D) Create a new 'Emergency Policies' folder at a lower hierarchical level. Place the emergency policies within this folder and push. To revert, disable or delete the policies within this folder and re-push. This approach can utilize a 'pre-rule' or 'post-rule' structure within the device group.
E) Export the configuration of affected firewalls, modify the XML to include the emergency rules, and re-import. To revert, re-import the original XML.

5. A global financial institution utilizes Strata Cloud Manager (SCM) to manage thousands of Palo Alto Networks firewalls. Due to strict regulatory compliance requirements (e.g., PCI DSS, GDPR), they need to ensure that all policy changes are peer-reviewed and logged with detailed audit trails. Furthermore, they want to automate the rollback of any erroneous policy deployments. Which SCM features, combined with external processes, would best achieve these objectives?

A) Granular RBAC, Audit Logs, Configuration Revision History, and API-driven rollback capabilities.
B) Device telemetry forwarding and advanced threat intelligence feeds.
C) Zero Touch Provisioning (ZTP) and Application-ID.
D) Integrated SD-WAN orchestration and Prisma Access integration.
E) Cloud-Delivered Security Services (CDSS) and threat prevention signatures.

Solutions: