PCNSA Device Management and Services — Timed 30 Questions

Question 1

A company wants to centrally manage multiple firewalls using Panorama. They need to reduce management IP usage on the firewalls. Which Panorama deployment model best achieves this?

Accepted Answer

Use Panorama in 'panorama' mode with templates and device groups. Using Panorama in 'panorama mode' with templates and device groups allows centralized management of multiple firewalls. While each firewall still requires a management IP, Panorama supports in-band management, where the management traffic can be carried over a data interface instead of the dedicated MGT port. This eliminates the need for a separate out-of-band management IP address per firewall, thus reducing management IP usage. Templates and device groups streamline configuration and policy deployment, but the IP reduction is achieved through in-band management configuration pushed via Panorama.

Answer

Use the firewall's default management mode with out-of-band management

Answer

Deploy firewalls in an Active/Active HA cluster

Answer

Configure a dedicated management subnet for each firewall

Question 2

An administrator is tasked with centralizing the management of 50 Palo Alto firewalls spread across four geographical regions. The company has a Panorama VM deployed in the data center. Each firewall must receive a common set of security policies and URL filtering profiles, but regional administrators need the ability to add locally required policies. The administrator configures Panorama with device groups: 'Shared' device group for global policies, and four regional device groups (Americas, EMEA, APAC, Oceania). They create a template for basic network settings and use template stacks. After pushing the Device Group and Template configuration, some regional firewalls report that they are not receiving the shared policies. What is the most likely cause?

Accepted Answer

The firewalls are not connected to Panorama due to management IP misconfiguration. The most likely cause is that the firewalls are not connected to Panorama due to management IP misconfiguration. In Palo Alto Panorama, the 'Shared' device group is automatically pushed to all connected firewalls regardless of device group hierarchy. Therefore, if some firewalls are not receiving shared policies, it indicates a connectivity issue rather than a hierarchy problem.

Answer

The 'Shared' device group is not included in the device group hierarchy for the regional device groups

Answer

Regional administrators created local policies in their own device groups with higher order than shared policies

Answer

The template stack does not include the shared template

Question 3

A security administrator notices that a user's traffic is being blocked unexpectedly. The user's IP is 10.1.1.100, and the traffic is destined to a web server at 192.168.2.10. The administrator has already verified that there are no security rules explicitly denying the traffic. Which Log Viewer query should the administrator use to quickly identify the cause?

Accepted Answer

Search Traffic logs with filters for source 10.1.1.100 and destination 192.168.2.10. Traffic logs capture every session that passes through the firewall, including allowed and denied connections. By filtering for the specific source IP (10.1.1.100) and destination IP (192.168.2.10), the administrator can quickly see the exact session details, including the action taken (e.g., deny, drop) and the reason (e.g., no matching rule, application override). This is the most direct method to identify why traffic is being blocked when no explicit deny rule exists.

Answer

Search Threat logs for the destination IP

Answer

Search Config logs for any rule changes

Answer

Search System logs for the user's IP

Question 4

A company wants to deploy a new firewall with a management interface on a separate VLAN to ensure management traffic is isolated from production traffic. Which interface type should be used for management access?

Accepted Answer

MGT (Management) interface. The MGT (Management) interface is a dedicated physical port on Palo Alto Networks firewalls designed specifically for out-of-band management traffic. It operates on a separate routing table and does not participate in production data forwarding, ensuring complete isolation of management traffic from production traffic as required by the scenario.

Answer

HA1 interface

Answer

VLAN interface

Answer

Ethernet 1/1

Question 5

During a firewall upgrade from PAN-OS 9.1 to 10.0, the administrator receives an error that the upgrade cannot proceed because there is a pending commit. The administrator checks the commit status and sees that a commit was initiated but has not completed. What is the best course of action?

Accepted Answer

Run 'commit force yes' from the CLI to force the commit. The 'commit force yes' command overrides a stuck or incomplete commit by forcing the commit operation to proceed, which clears the pending commit state and allows the upgrade to continue. In PAN-OS, a pending commit blocks administrative operations like upgrades, and forcing the commit is the safest way to resolve this without disrupting the firewall's operational state.

Answer

Reboot the firewall to clear the pending commit

Answer

Wait for the commit to complete automatically

Answer

Cancel the upgrade and restart

Question 6

An administrator needs to generate a report showing all applications used by a specific user group over the past week. Which method is most efficient?

Accepted Answer

Use the ACC (Application Command Center) and filter by user group and time range. The ACC (Application Command Center) is purpose-built for rapid application visibility and analysis. By filtering by user group and time range directly within the ACC, the administrator can instantly see the top applications used by that group without exporting or manually parsing logs, making it the most efficient method for this specific reporting need.

Answer

Export Traffic logs to CSV and analyze in Excel

Answer

Use the Top Applications report in the Reports tab

Answer

Use the Monitor tab's Session Browser with a filter for the user group

Question 7

A network engineer wants to configure a new VLAN interface on a Palo Alto Networks firewall. After creating the VLAN object and assigning it to an Ethernet interface, the VLAN interface remains down. What is the most likely cause?

Accepted Answer

The Ethernet interface is not set to layer 2 mode or the VLAN tag is not allowed. For a VLAN interface to be operational on a Palo Alto Networks firewall, the underlying Ethernet interface must be configured in Layer 2 mode and the specific VLAN tag must be allowed on that interface. If the Ethernet interface remains in Layer 3 mode or the VLAN tag is not included in the allowed list, the VLAN interface will remain administratively down, as it cannot associate with a physical port that is not set to accept VLAN traffic.

Answer

The VLAN interface needs an IP address configured

Answer

The VLAN interface must be assigned to a virtual router

Answer

The firewall needs a commit to apply the changes

Question 8

An organization is deploying a firewall in a high-availability (HA) pair. The administrator wants to ensure that session state is synchronized between the firewalls so that active sessions are not dropped during failover. Which configuration is required?

Accepted Answer

Enable Session Setup and State Synchronization under HA configuration. Session state synchronization (also known as stateful failover) requires enabling both Session Setup and State Synchronization under the HA configuration. This ensures that the active firewall's session table is continuously replicated to the passive firewall, so when a failover occurs, existing sessions are not dropped and can continue without interruption.

Answer

Configure HA1 and HA2 interfaces with appropriate IPs

Answer

Enable Config Sync on the HA General tab

Answer

Configure Path Monitoring to detect link failures

Question 9

A security analyst notices that a legitimate application is being incorrectly identified as a different application by the firewall. What is the best first step to resolve this issue?

Accepted Answer

Verify the application signature in the App-ID database and submit a false-positive report if needed. The first step in resolving an application misidentification is to verify the application signature in the App-ID database. If the signature is incorrect or missing, submitting a false-positive report allows Palo Alto Networks to update the database, ensuring accurate identification without manual overrides. This aligns with the principle of using the built-in App-ID engine as the primary identification method.

Answer

Reboot the firewall to refresh the application cache

Answer

Disable the application override and use port-based rules

Answer

Create a custom App-ID to override the incorrect identification

Question 10

An administrator needs to back up the firewall configuration before making changes. Which method creates a complete backup that can be restored to the same or a different firewall?

Accepted Answer

Use the 'Device > Setup > Operations > Export named configuration snapshot' and select 'running-config.xml'. Exporting the running-config.xml via 'Device > Setup > Operations > Export named configuration snapshot' creates a complete XML backup of the entire running configuration. This file can be imported and restored to the same or a different firewall of the same model and PAN-OS version, ensuring full recovery of all settings, including network, policy, and object configurations.

Answer

Use the 'Device > Setup > Operations > Save named configuration snapshot' option

Answer

Use the 'Save Candidate Config' option in the GUI

Answer

Use the CLI command 'show config running' and copy the output

Question 11

Which TWO of the following are valid methods to upgrade the PAN-OS version on a Palo Alto Networks firewall?

Accepted Answer

Using the GUI under Device > Dynamic Updates > Software. The PAN-OS software upgrade can be initiated via the GUI under Device > Dynamic Updates > Software, where administrators can download and install new PAN-OS versions. This is a standard method for upgrading the firewall's operating system through the web interface.

Answer

Using the GUI under Device > Dynamic Updates > Content Updates

Answer

Downloading the image via SCP and using 'load software'

Answer

Using Panorama's 'Software' tab to push an upgrade to the firewall

Question 12

Which THREE of the following are valid steps when configuring a new virtual wire (vwire) on a Palo Alto Networks firewall?

Accepted Answer

Add two or more interfaces as members of the virtual wire. A virtual wire requires at least two interfaces to be added as members, which allows the firewall to transparently bridge traffic between them without any IP configuration. The virtual wire acts as a Layer 2 bump-in-the-wire, so interfaces are placed into the vwire to forward frames based on MAC addresses, not IP routing.

Answer

Assign an IP address to the virtual wire

Answer

Create a security policy allowing traffic on the virtual wire

Question 13

Which TWO of the following are valid methods to collect a technical support file from a Palo Alto Networks firewall?

Accepted Answer

Using the GUI under Device > Troubleshooting > Generate Tech Support File. The Palo Alto Networks firewall GUI provides a dedicated path under Device > Troubleshooting > Generate Tech Support File to generate and download a comprehensive technical support file. This file bundles logs, configuration, and system state data essential for troubleshooting.

Answer

Using the CLI command 'save config to tftp'

Answer

Using the GUI under Monitor > Packet Capture

Answer

Using the CLI command 'show tech-support'

Question 14

Refer to the exhibit. The firewall is experiencing performance issues and dropping sessions. Based on the exhibit, what is the most likely cause?

Accepted Answer

Dataplane resources are exhausted. The exhibit shows that the dataplane (DP) utilization is at 100%, which directly indicates that the dataplane resources are exhausted. When the dataplane is fully utilized, the firewall cannot process new sessions or maintain existing ones, leading to session drops and performance issues. This is the most likely cause because the dataplane handles packet forwarding and session setup, and its exhaustion is a common bottleneck in high-throughput environments.

Answer

The firewall has been recently rebooted

Answer

System CPU is too high

Answer

The session limit is being reached

Question 15

Refer to the exhibit. A user at 10.1.1.50 is unable to connect to 192.168.1.100 on TCP port 443. The traffic log shows no entries for that source IP. Which security rule is expected to match this traffic?

Accepted Answer

Rule 1 (Allow-Sales). (Rule 1 – Allow-Sales) is correct. The source 10.1.1.50 belongs to the Sales zone, and the destination 192.168.1.100 belongs to the Servers zone. This is interzone traffic. Rule 1 explicitly permits traffic from Sales to Servers on TCP port 443, so it matches this traffic. The traffic log shows no entries because logging is disabled on Rule 1. The user's inability to connect is likely due to a server-side issue (e.g., the server not listening on port 443) or a routing problem, not because the firewall is dropping the traffic.

Answer

Interzone-default

Answer

Intrazone-default

Answer

Rule 2 (Allow-HR)

Question 16

A company has two Palo Alto Networks firewalls in an active/passive HA pair (PA-5250) running PAN-OS 10.1. The HA configuration uses dedicated HA1 (control link) and HA2 (data link) interfaces. The network team recently replaced a failed switch that connected the HA1 interfaces. After the switch replacement, the HA pair is not forming. The administrator logs into the active firewall and runs 'show high-availability state' which shows the local state as 'active' and the peer state as 'unknown'. The HA1 interface status shows 'link down'. The administrator checks the physical connections and confirms the cables are connected and the switch ports are up. What is the most likely cause and the best course of action?

Accepted Answer

Verify that the HA1 interfaces are on the same VLAN and can ping each other using the configured HA1 IP addresses. The HA1 interfaces must be on the same Layer 2 domain (VLAN) and able to communicate via ICMP to form the control link. The 'link down' status on the HA1 interface, despite physical connectivity, indicates a Layer 2 misconfiguration (e.g., VLAN mismatch or port mode issue) on the replaced switch. Verifying that the HA1 IP addresses can ping each other confirms Layer 3 reachability, which is essential for HA1 heartbeats and state synchronization.

Answer

Ensure that the HA2 interfaces are also connected and configured correctly

Answer

Change the HA2 IP addresses to be on the same subnet as HA1

Answer

Enable HA ping on the HA1 interface to test connectivity

Question 17

A network administrator notices that a specific user behind a PA-820 firewall is unable to reach a critical SaaS application, while other users can access it without issues. The administrator checks the traffic logs and sees the session is being denied. Which step should the administrator take next to identify the root cause?

Accepted Answer

Check the Traffic log with the session's source IP and destination. The Traffic log already shows the session is denied, and filtering by the specific user's source IP and the destination SaaS application will reveal the exact security policy or rule that is blocking the traffic. This allows the administrator to identify whether the issue is due to a misconfigured policy, an application override, or a user-specific rule, rather than a global or interface-level problem.

Answer

Check the System log for related entries

Answer

Run a packet capture on the ingress interface

Answer

Check the global counters for dropped packets

Question 18

A security engineer needs to ensure that all traffic from the internal network to the internet is inspected by the firewall. The firewall is deployed in virtual wire mode (Layer 2) with subinterfaces. Which configuration is required to achieve this?

Accepted Answer

Create a security policy rule that allows traffic from the internal zone to the external zone. In a virtual wire deployment (which operates at Layer 2), traffic inspection is still governed by security policy rules. A rule allowing traffic from the internal zone to the external zone ensures that all outbound traffic is evaluated and inspected by the firewall. Security policies are the primary mechanism for controlling and logging traffic, regardless of the deployment mode.

Answer

Define a NAT policy to translate internal IPs to the external interface

Answer

Enable SSL decryption on the firewall

Answer

Configure a virtual wire between the internal and external interfaces

Question 19

A company has a PA-5250 firewall in an active/passive HA pair. During a maintenance window, the administrator upgrades the passive firewall from PAN-OS 10.0 to 10.1. After the upgrade, the passive firewall fails to synchronize with the active firewall. The active firewall remains at 10.0. What is the most likely cause?

Accepted Answer

The PAN-OS versions are different between the HA peers. PAN-OS requires both HA peers to run the same major version to synchronize configuration and state. The active firewall at PAN-OS 10.0 and the passive at 10.1 are incompatible, preventing HA synchronization. Even though the passive firewall was upgraded, the active firewall remains on the older version, breaking the HA session.

Answer

The HA2 link is down or misconfigured

Answer

The HA keepalive timer is misconfigured

Answer

The passive firewall has preemption enabled

Question 20

A network administrator wants to allow FTP traffic from the internal network to a specific external server. The administrator creates a security policy rule with source zone 'internal', destination zone 'external', destination IP of the server, and application 'ftp'. However, the traffic is still blocked. What is the most likely reason?

Accepted Answer

The FTP application requires additional configuration for passive mode. FTP uses two separate channels: a control channel (TCP 21) and a data channel. In passive mode, the client initiates both connections, but the data channel uses a random high port negotiated via the control channel. The Palo Alto Networks firewall's application decoder for FTP must inspect the control channel to dynamically open pinholes for the data channel; without this, the data connection is blocked even if the control channel is allowed. Option D is correct because the administrator likely created a rule for application 'ftp' but did not ensure that the FTP application's passive mode data connections are properly handled, which requires the firewall to perform application-level inspection and create temporary security policy openings for the negotiated data ports.

Answer

The destination IP is not covered by a NAT policy

Answer

Logging is not enabled on the rule

Answer

The rule is set to deny instead of allow