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PSE-Software Firewall Professional
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Palo Alto Networks Systems Engineer (PSE): Software Firewall Professional Questions and Answers

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Questions # 11:

What helps avoid split brain in active-passive high availability (HA) pair deployment?

Options:

Enabling preemption on both firewalls in the HA pair

Using a standard traffic interface as the HA2 backup

Using a standard traffic interface as the HA3 link

Using the management interface as the HA1 backup link

Answer

Explanation

To avoid split brain scenarios in an active-passive high availability (HA) pair deployment, the management interface can be used as the HA1 backup link. This ensures reliable communication between the HA pair and prevents both firewalls from assuming the active role simultaneously, which can happen if they lose connectivity with each other on the primary HA1 link.

References:

Palo Alto Networks High Availability Guide: HA Configuration

Best Practices for HA Configuration: Avoiding Split Brain

Questions # 12:

Which two mechanisms could trigger a high availability (HA) failover event? (Choose two.)

Options:

Ping monitoring

Link monitoring

Session polling

Heartbeat polling

Answer

A, B

Explanation

Ping monitoring:

This mechanism involves monitoring the reachability of a specified IP address. If the firewall cannot ping the address, it may trigger a failover.

[Reference: PAN-OS High Availability (HA) documentation explains that ping monitoring is used to verify the path to a network resource, and failure can trigger an HA event., PAN-OS Administrator’s Guide - HA, Link monitoring:, Link monitoring checks the status of network links. If a monitored link fails, an HA failover can be triggered., Reference: Link monitoring is described in the PAN-OS documentation as a key component of the HA functionality, used to detect link failures., PAN-OS High Availability Link Monitoring, , ]

Questions # 13:

Which two factors lead to improved return on investment for prospects interested in Palo Alto Networks virtualized next-generation firewalls (NGFWs)? (Choose two.)

Options:

Reduced operational expenditures

Decreased likelihood of data breach

Reduced insurance premiums

Reduced time to deploy

Answer

A, D

Explanation

Prospects interested in Palo Alto Networks virtualized next-generation firewalls (NGFWs) can achieve improved return on investment (ROI) through the following factors:

Reduced operational expenditures: Virtualized NGFWs reduce the need for physical hardware, lowering the costs associated with purchasing, maintaining, and managing hardware appliances. This also includes savings on power, cooling, and physical space requirements.

[: Benefits of Virtualized NGFWs, Reduced time to deploy: Virtual NGFWs can be quickly deployed in various environments, such as public clouds or virtualized data centers, compared to the time-consuming process of installing physical hardware. This agility allows organizations to respond faster to security needs and market demands., Reference: Quick Deployment of Virtual Firewalls, , ]

Questions # 14:

What are two requirements for automating service deployment of a VM-Series firewall from an NSX Manager? (Choose two.)

Options:

Panorama has been configured to recognize both the NSX Manager and vCenter.

vCenter has been given Palo Alto Networks subscription licenses for VM-Series firewalls.

The deployed VM-Series firewall can establish communications with Panorama.

Panorama can establish communications to the public Palo Alto Networks update servers.

Answer

A, C

Explanation

For automating the deployment of VM-Series firewalls from NSX Manager, Panorama must be configured to recognize and communicate with both the NSX Manager and vCenter. This ensures that Panorama can manage the firewall policies and orchestration efficiently.

[Reference: The Palo Alto Networks documentation on integrating Panorama with NSX Manager and vCenter provides steps for configuration., Palo Alto Networks NSX Integration Guide, VM-Series Firewall Communication with Panorama:, It is crucial that the deployed VM-Series firewall can establish communication with Panorama. This connection allows for the centralized management of the firewalls and ensures that policy updates and configurations can be pushed from Panorama to the VM-Series firewalls., Reference: Documentation highlights the need for communication between VM-Series firewalls and Panorama for effective management and updates., Palo Alto Networks VM-Series Deployment Guide, , ]

Questions # 15:

When implementing active-active high availability (HA), which feature must be configured to allow the HA pair to share a single IP address that may be used as the network's gateway IP address?

Options:

Floating IP address

VRRP

ARP load sharing

HSRP

Answer

Explanation

When implementing active-active high availability (HA), a floating IP address must be configured to allow the HA pair to share a single IP address that may be used as the network's gateway IP address. This floating IP address ensures that either of the active-active firewalls can assume control of the traffic without interruption in case of a failover.

References:

Palo Alto Networks High Availability Guide: Active-Active HA Configuration

Palo Alto Networks HA Configuration: HA Configuration

Questions # 16:

Which two statements apply to the VM-Series plugin? (Choose two.)

Options:

It can manage Panorama plugins.

It can be upgraded independently of PAN-OS.

It can manage capabilities common to both VM-Series firewalls and hardware firewalls.

It enables management of cloud-specific interactions between VM-Series firewalls and supported public cloud platforms.

Answer

B, D

Explanation

Independent Upgrade:

The VM-Series plugin can be upgraded independently of the PAN-OS version. This allows for flexibility in maintaining and enhancing the plugin without the need for a complete PAN-OS upgrade.

[Reference: Palo Alto Networks documentation on VM-Series plugins highlights their independent upgrade capability., Palo Alto Networks VM-Series Plugin Guide, Management of Cloud-Specific Interactions:, The VM-Series plugin is designed to manage interactions between VM-Series firewalls and public cloud platforms. This includes handling cloud-specific configurations and integrations, ensuring seamless operation within cloud environments., Reference: The plugin documentation details how it facilitates cloud-specific interactions and integrations., Palo Alto Networks VM-Series Plugin Guide, , ]

Questions # 17:

Which PAN-OS feature allows for automated updates to address objects when VM-Series firewalls are setup as part of an NSX deployment?

Options:

Dynamic Address Group

Hypervisor integration

Bootstrapping

Boundary automation

Answer

Explanation

Dynamic Address Groups in PAN-OS allow for automated updates to address objects when VM-Series firewalls are set up as part of an NSX deployment. These address groups can dynamically include members based on criteria such as tags, enabling automated and flexible security policies that adjust to changes in the virtual environment.

References:

Palo Alto Networks Dynamic Address Groups: Dynamic Address Groups

NSX and VM-Series Integration: NSX Integration Guide

Questions # 18:

Which Palo Alto Networks firewall provides network security when deploying a microservices-based application?

Options:

VM-Series

PA-Series

HA-Series

CN-Series

Answer

Explanation

The CN-Series firewalls are specifically designed to secure Kubernetes and containerized environments, making them ideal for protecting microservices-based applications. They provide network security by integrating directly with the container orchestration platform.

[Reference: Palo Alto Networks documentation on CN-Series firewalls details their suitability for securing microservices and containerized applications., Palo Alto Networks CN-Series Documentation, , ]

Questions # 19:

Why are VM-Series firewalls and hardware firewalls that are external to the Kubernetes cluster problematic for protecting containerized workloads?

Options:

They function differently based on whether they are located inside or outside of the cluster.

They are located outside the cluster and have no visibility into application-level cluster traffic.

They are managed by another entity when located inside the cluster.

They do not scale independently of the Kubernetes cluster.

Answer

Explanation

Visibility into application-level cluster traffic:

VM-Series firewalls and hardware firewalls that are external to the Kubernetes cluster lack the necessary visibility into the traffic and communications occurring at the application level within the cluster. This limitation impedes their ability to effectively protect containerized workloads.

[Reference: Palo Alto Networks documentation highlights the challenges of external firewalls in securing Kubernetes environments due to limited visibility into internal traffic., Palo Alto Networks Kubernetes Security Guide, , ]

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