Palo Alto Networks PAN-NSA Online Practice Questions and Exam Preparation

Palo Alto Networks PAN-NSA Online Questions & Answers

• Question 61:

  A user reports that they are being blocked from a website with a "Certificate Error."

  Which log will help the analyst determine if the firewall is blocking the session because the web server is using an expired certificate?

  A. Traffic Log
  B. Threat Log
  C. Decryption Log
  D. System Log
  C. Decryption Log

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  Explanation

  Comprehensive and Detailed 150 to 250 words of Explanation From Palo Alto Networks Network Security Analyst Knowledge: When a firewall is performing SSL/TLS decryption, it acts as a proxy for the encrypted connection. If the firewall encounters an issue with the destination server's certificate-such as an expiration, an untrusted issuer, or a mismatch-the Decryption Log is the specific resource for troubleshooting. The Decryption Log provides detailed information about why a decrypted session was failed or blocked. It explicitly lists the "Error" or "Reason" for the failure, such as expired-certificate or untrusted-issuer. While the Traffic Log (Option A) might show a "deny" or "reset" action, it will not provide the specific certificate details. By checking the Decryption Log, the analyst can confirm if the issue is a security problem with the external site or if the firewall's decryption profile needs to be adjusted to allow the connection (e.g., if it is a trusted internal site with a self-signed certificate).

• Question 62:

  What is the most granular method for ensuring that traffic to a firewall's public IP address on the public interface is translated to the private IP address of the web server?

  A. Create one NAT policy, ensure the policy has original packet destination IP as the public IP address and translated packet destination IP as the private IP address, and mark Bi-directional as "Yes."
  B. Create one NAT policy, set the source address to the public IP address and destination address to the private IP address, and ensure Bi-directional is checked.
  C. Create two static NAT policies, ensure one policy has original packet destination IP as the public IP address and translated packet destination IP as the private IP address, ensure the other policy has original packet source IP as the private IP address and the translated packet source IP as the public IP address.
  D. Create one NAT policy, ensure the policy has original packet source IP as the private IP address and the translated packet source IP as the public IP address, and mark Bi-directional as "Yes."
  D. Create one NAT policy, ensure the policy has original packet source IP as the private IP address and the translated packet source IP as the public IP address, and mark Bi-directional as "Yes."

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  Explanation

  Comprehensive and Detailed 150 to 250 words of Explanation From Palo Alto Networks Network Security Analyst Knowledge:

  In Palo Alto Networks PAN-OS, the most efficient and granular way to configure a 1-to-1 static NAT (Network Address Translation) for a server-such as a web server-is to use a Bi-directional NAT statement. The specific logic required by the firewall is to define the rule from the perspective of the outbound traffic (Source NAT) while enabling the "Bi-directional" checkbox. When you create a NAT policy where the Original Packet source is the private IP address of the web server and the Translated Packet source is the public IP address, checking the Bi-directional box causes the firewall to automatically create an implicit "twin" rule. This hidden rule handles the inbound (Destination NAT) traffic, mapping the public IP back to the private IP for incoming requests.

  Option D is correct because it correctly identifies the required "Original Source" as the private IP.

  Option A is incorrect because Bi-directional NAT cannot be enabled on a rule where the translation type is Destination NAT.

  Option C is technically functional but is not the most "granular" or efficient method, as it requires manual management of two separate rules, increasing the risk of configuration drift. By using the Bi-directional setting on the source-based rule, the analyst ensures that the server can both initiate outbound connections (like updates) and receive inbound traffic (like web requests) using a single, consistent mapping.

• Question 63:

  There are intermittent connectivity issues between two internal zones on a PA-Series firewall. Although the Security policies appear correctly configured, traffic between the zones is experiencing unexpected drops.

  Which troubleshooting step will isolate the root cause of this behavior?

  A. Use the CLI command tcpdump filter and set the source and destination zones in the filter to capture and analyze traffic flows between zones, checking for packet loss on the data plane.
  B. Use the CLI command show system info to monitor CPU and memory usage, ensuring that resource constraints are not causing interfaces to drop packets between zones.
  C. Use the PAN-OS GUI Troubleshooting tool to review interface status, verify zone assignments, and confirm that all links are operational.
  D. Use the CLI command show system state filter sys.sl.* | match Error to find interface errors across all the interfaces.
  D. Use the CLI command show system state filter sys.sl.* | match Error to find interface errors across all the interfaces.

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  Explanation

  Comprehensive and Detailed 150 to 250 words of Explanation From Palo Alto Networks Network Security Analyst Knowledge: When a Network Security Analyst encounters "unexpected drops" despite valid Security policies, the investigation must shift from the logical policy layer to the physical and hardware interface layer. Intermittent issues are frequently caused by hardware-level errors, such as CRC errors, duplex mismatches, or faulty cables /transceivers, which occur before the firewall even begins processing the traffic via the Security rulebase. The command show system state filter sys.sl.* | match

  Error (Option D) is a powerful, low-level troubleshooting tool used to query the system state database. It identifies hardware-level errors across all internal and external interfaces (the sys.sl namespace refers to "System Link" status). If an interface is experiencing incrementing error counters, it explains why traffic is intermittently dropping even if the policy is configured correctly to "Allow."

  Option A is incorrect because standard tcpdump on the management plane does not natively filter by "zones" and may not capture hardware-induced drops that occur at the physical layer before reaching the packet capture engine.

  Option B provides system-wide health but lacks the specific interface granularity needed here.

  Option C is a general health check but often lacks the depth of the raw error counters found in the system state database. By using the command in Option D, an analyst can pinpoint the exact physical or logical interface failure, facilitating a targeted resolution such as replacing hardware or correcting port settings.

• Question 64:

  Which tool should an analyst use to view a real-time, graphical representation of the top applications, users, and threats across the network to identify immediate anomalies?

  A. Log Viewer
  B. ACC (Application Command Center)
  C. Config Audit
  D. Policy Optimizer
  B. ACC (Application Command Center)

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  Explanation

  Comprehensive and Detailed 150 to 250 words of Explanation From Palo Alto Networks Network Security Analyst Knowledge: The Application Command Center (ACC) is the primary visual monitoring tool for a Palo Alto Networks analyst. Unlike the Log Viewer, which provides a text-based, chronological list of events, the ACC provides an aggregated, graphical dashboard that highlights trends and anomalies. The ACC uses "widgets" to display data such as the "Top Applications," "Top Threats," and "Top Users by Bandwidth". For an analyst, the ACC is the starting point for "threat hunting" and performance monitoring. For example, if an analyst sees a sudden spike in "Unknown-UDP" traffic in the ACC, they can click on that specific widget to "drill down" and see which users and source IPs are responsible for that traffic. This allows the analyst to quickly identify potential botnet activity or misconfigured applications that would be much harder to spot in raw log data.

• Question 65:

  Which feature allows the firewall to automatically identify and categorize IoT (Internet of Things) devices based on their unique network behavior?

  A. Device-ID
  B. App-ID
  C. User-ID
  D. IoT Security Subscription
  A. Device-ID

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  Explanation

  Comprehensive and Detailed 150 to 250 words of Explanation From Palo Alto Networks Network Security Analyst Knowledge: While App-ID identifies the software, Device-ID is a newer Palo Alto Networks technology (often paired with the IoT Security subscription) that identifies the physical device type (e.g., a Siemens PLC, a Philips MRI machine, or an Amazon Echo).

  Device-ID uses machine learning to analyze the traffic patterns, MAC addresses, and protocols unique to IoT devices. Once identified, the analyst can write security policies based on the "Device-ID" rather than IP addresses. For example, an analyst can create a rule that says "All Infusion Pumps are only allowed to talk to the Medical Management Server." This provides much higher granularity and security for IoT environments, where devices often have weak internal security and fixed, hard-to-manage identities.

• Question 66:

  An organization wants to centralize network and device settings such as interfaces, virtual routers, DNS, and NTP for multiple firewalls managed from Panorama.

  Which Panorama component is designed for this purpose?

  A. Device Group
  B. Template
  C. Rule Usage
  D. Log Collector Group
  B. Template

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  Explanation

  Comprehensive and Detailed 150 to 250 words of Explanation From Palo Alto Networks Network Security Analyst Knowledge: A Template is the Panorama component used to manage network and device settings across multiple firewalls. This includes items such as interfaces, zones, virtual routers, server profiles, DNS, NTP, and other settings normally found under the Network and Device tabs on a local firewall. Templates help administrators maintain consistency across large environments while simplifying deployment and operations.

  Option A is incorrect because a Device Group is primarily used for managing policies and shared objects rather than network and device configuration.

  Option C is incorrect because Rule Usage is a policy analysis feature and has no role in centralized device configuration.

  Option D is incorrect because a Log Collector Group is related to log storage and collection architecture, not interface or routing configuration.

  For a Network Security Analyst, understanding the difference between Templates and Device Groups is essential. Templates standardize the foundational behavior of managed firewalls, while Device Groups handle policy logic. Using the correct management component prevents configuration sprawl and reduces the likelihood of inconsistent network settings across sites. This is especially important in distributed environments where many devices need a consistent baseline but may still require limited local variation through template variables.

• Question 67:

  A security administrator is creating an internet of things (IoT) Security policy and needs to select behaviors for the traffic.

  

  Which characteristic has the greatest impact to the risk level of applications?

  A. Used by Malware
  B. Pervasive
  C. Tunnels Other Apps
  D. Known Vulnerabilities
  A. Used by Malware

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  Explanation

  Comprehensive and Detailed 150 to 250 words of Explanation From Palo Alto Networks Network Security Analyst Knowledge: In the Palo Alto Networks ecosystem, App-ID utilizes specific characteristics to help administrators assess the risk profile of applications traversing the network. These characteristics-which include whether an application is evasive, prone to misuse, or capable of file transfer-are aggregated into a numerical Risk Score ranging from 1 (lowest risk) to 5 (highest risk). Among the listed characteristics, "Used by Malware" (A) typically has the greatest immediate impact on the assigned risk level. This characteristic indicates that the application is a known vector for Command and Control (C2) traffic, data exfiltration, or payload delivery, necessitating a high risk rating (often 4 or 5).

  While "Known Vulnerabilities" (D) and "Tunnels Other Apps" (C) certainly increase the risk level by providing an exploit surface or obscuring visibility, they represent potential risks. In contrast, an application being actively "Used by Malware" represents a direct and validated threat to the environment. "Pervasive" (B) refers to how common an application is and generally does not drive a high-risk score on its own. For an analyst building an IoT Security policy, prioritizing applications with the "Used by Malware" characteristic is critical, as many IoT devices lack robust internal security and are frequently recruited into botnets via these specific communication channels.

• Question 68:

  A Palo Alto Networks NGFW for a high-security environment is being configured and requires a security profile group that includes vulnerability protection.

  When configuring the action based on the severity of the threat types, what does Palo Alto Networks recommend? (Choose one answer)

  A. Use action "reset-both" for critical, high, and medium vulnerabilities.
  B. Use action "alert" for critical, high, and medium vulnerabilities.
  C. Use action "allow" for critical, high, and medium vulnerabilities.
  D. Use action "default" for critical, high, and medium vulnerabilities.
  D. Use action "default" for critical, high, and medium vulnerabilities.

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  Explanation

  Comprehensive and Detailed 150 to 250 words of Explanation From Palo Alto Networks Network Security Analyst Knowledge: For organizations deploying Next-Generation Firewalls (NGFWs), Palo Alto Networks provides a set of pre-configured "Best Practice" recommendations for Security Profiles. In the context of a Vulnerability Protection profile, the recommended best practice for all threat severities (critical, high, medium, low, and informational) is to use the "default" action.

  The "default" action is not a single static response; rather, it is a dynamic setting where the firewall applies the specific action (such as reset-both, drop, or alert) that Palo Alto Networks' threat research team has determined to be the most appropriate for each individual signature. For critical and high-severity vulnerabilities that represent clear exploit attempts, the default action is typically set to block the traffic. For lower-severity or informational signatures, the default action might simply be to alert. By using the "default" action, a Network Security Analyst ensures that the security posture stays aligned with the latest threat intelligence and research without the administrative burden of manually overriding

  thousands of individual signature actions, which can lead to accidental security gaps or performance-degrading false positives.

• Question 69:

  What is the function of a "Service" object in a Palo Alto Networks firewall configuration?

  A. To define the Layer 7 App-ID signatures.
  B. To define the Layer 4 protocol (TCP/UDP) and port numbers.
  C. To specify the URL categories to be blocked.
  D. To set the QoS priority for specific traffic.
  B. To define the Layer 4 protocol (TCP/UDP) and port numbers.

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  Explanation

  Comprehensive and Detailed 150 to 250 words of Explanation From Palo Alto Networks Network Security Analyst Knowledge: While Palo Alto Networks firewalls are famous for Layer 7 App-ID inspection, they still require Service objects to define the Layer 4 (Transport Layer) parameters of a connection. A Service object defines whether the traffic is TCP or UDP and specifies the Destination Port. A core objective for an analyst is managing these objects to maintain security. For instance, when creating a Security rule, an analyst can set the Service to application-default, which tells the firewall to only allow the application on its standard ports. However, if an internal application uses a non-standard port, the analyst must create a custom Service object for that specific port. This ensures that the firewall's state engine knows which ports to open for the session. Service objects can also be grouped into Service Groups to simplify policy management, allowing an analyst to update a single group object rather than editing multiple individual security rules.

• Question 70:

  A user reports that a specific business application is dropping connection every few minutes. The analyst wants to see if the firewall's session table is reaching its limit for that specific user.

  Which tool should the analyst use?

  A. ACC (Application Command Center)
  B. Session Browser
  C. Rule Usage Filter
  D. Policy Optimizer
  B. Session Browser

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  Explanation

  Comprehensive and Detailed 150 to 250 words of Explanation From Palo Alto Networks Network Security Analyst Knowledge:

  The Session Browser (found under the Monitor tab) provides a real-time view of every active session currently being processed by the firewall's data plane. Unlike the Traffic Log, which shows completed or denied sessions, the Session

  Browser allows an analyst to inspect "live" traffic. By filtering the Session Browser by the user's source IP, the analyst can see exactly how many sessions are open, the state of those sessions (e.g., active, discard, or closing), and the time-to- live (TTL) for each session. If an application is frequently dropping, the analyst can check if the session is timing out prematurely or if the host is reaching a session limit set by a DoS Protection profile. This granular, real-time visibility is

  essential for troubleshooting complex application performance issues that do not necessarily appear as a "deny" in the standard log files.