PCNSA Palo Alto Networks Platforms and Architecture Practice Test 4 — 15 Questions

Question 1

Based on the exhibit, what will happen when a user in the trust zone attempts to access an HTTPS website (TCP 443)?

Accepted Answer

The traffic will be denied by the implicit deny rule because the application does not match.. Option D is correct because the security rule shown in the exhibit specifies the application as 'ssl' (HTTPS), but the user is attempting to access an HTTPS website using TCP 443. However, the rule's application match is likely set to a different application or the traffic is being classified as 'web-browsing' or another application that does not match the rule's application condition. Since no rule explicitly permits the traffic, the implicit deny rule at the end of the rulebase will block it. Palo Alto Networks firewalls use App-ID to identify applications regardless of port, so even if TCP 443 is used, the application must match exactly for the rule to apply.

Answer

The traffic will be allowed if the user uses HTTP instead.

Answer

The traffic will be allowed because the rule has log-start enabled.

Answer

The traffic will be allowed because the source and destination zones match.

Question 2

Based on the exhibit, what action did the firewall take on this traffic?

Accepted Answer

Allowed the traffic.. The exhibit shows a traffic log entry with the action 'allow' (or a green checkmark indicating a permit), meaning the firewall evaluated the traffic against security policies and determined it matched a rule set to allow. The session was established and forwarded without being blocked or reset, confirming the correct answer is C.

Answer

Reset the connection.

Answer

Blocked the URL.

Answer

Denied the traffic.

Question 3

A junior administrator is investigating a network issue where traffic to a critical server is being blocked. To see the specific security rule that matched and the action taken, which log should the administrator review?

Accepted Answer

Traffic log. The Traffic log records every session that traverses the firewall, including the specific security rule that matched and the action taken (allow, deny, drop, etc.). Since the administrator needs to identify which rule blocked the traffic to the critical server, the Traffic log is the correct source. System, Threat, and Config logs do not provide per-session rule matching details.

Answer

System log

Answer

Threat log

Answer

Config log

Question 4

A network engineer is configuring a new PA-220 firewall in a small branch office. The firewall must be managed centrally from Panorama. What is the first step after physically installing the firewall?

Accepted Answer

Configure the management IP address and authenticate to Panorama.. The correct first step after physically installing a Palo Alto Networks firewall is to configure the management IP address and authenticate to Panorama. Without a reachable management IP, the firewall cannot communicate with Panorama for registration, device group assignment, or configuration pushes. This foundational step establishes the initial network connectivity required for all subsequent centralized management operations.

Answer

Register the firewall with Panorama using the serial number.

Answer

Create a device group in Panorama and add the firewall.

Answer

Push the initial configuration from Panorama to the firewall.

Question 5

A security architect is planning a deployment for a multi-tenant data center where each tenant requires isolated security policies and separate administrators. Which Palo Alto Networks architecture best meets these requirements?

Accepted Answer

Deploy a single firewall with multiple virtual systems (vsys).. Virtual systems (vsys) allow a single Palo Alto Networks firewall to be partitioned into multiple logical firewalls, each with its own independent security policies, administrators, and virtual routers. This provides complete tenant isolation and separate administrative domains without requiring additional physical hardware, making it the ideal architecture for a multi-tenant data center.

Answer

Deploy a single firewall with multiple virtual routers and separate zone definitions.

Answer

Use a single firewall with a single management profile and role-based access control.

Answer

Deploy multiple physical firewalls, one per tenant.

Question 6

An administrator needs to deploy a Palo Alto Networks firewall in a location where the network infrastructure does not support routing. The firewall must be transparent to the existing network. Which deployment mode should be used?

Accepted Answer

Virtual wire. Virtual wire mode allows the firewall to be deployed transparently without requiring any routing configuration, as it operates at Layer 2 by binding two interfaces together and forwarding traffic based on MAC addresses. This mode is ideal when the existing network infrastructure does not support routing and the firewall must be invisible to the network, as it does not participate in routing protocols or require IP addresses on the connected interfaces.

Answer

HA mode

Answer

Layer 3

Answer

Tap mode

Question 7

A company is expanding its network and needs to add a new data center. The two data centers will be connected via a WAN link. To protect the traffic between data centers, the security team wants to use site-to-site VPNs. Which Palo Alto Networks feature is used to route traffic between VPN tunnels and security zones?

Accepted Answer

Virtual routers. Virtual routers are the correct feature because they function as Layer 3 routing instances within Palo Alto Networks firewalls, enabling the routing of traffic between VPN tunnels (which terminate on tunnel interfaces) and security zones. When a site-to-site VPN is configured, the tunnel interface is assigned to a virtual router, which then uses static or dynamic routing protocols (e.g., BGP, OSPF) to forward traffic between the tunnel and the zone's egress interface. This allows the firewall to make forwarding decisions between the encrypted VPN path and the protected internal network segments.

Answer

Virtual wires

Answer

Security policies

Answer

Interface management profiles

Question 8

An organization is experiencing performance degradation on their PA-5250 firewall after enabling SSL decryption for all traffic. The firewall's CPU usage is consistently above 80%. The decision is made to offload SSL decryption to a dedicated appliance. Which deployment architecture allows the Palo Alto firewall to inspect decrypted traffic while the decryption occurs elsewhere?

Accepted Answer

Configure the firewall to receive decrypted traffic from an external SSL decryptor on a specific zone.. Option B is correct because it describes a deployment where an external SSL decryptor handles the decryption, and the Palo Alto firewall receives the already-decrypted traffic on a dedicated zone. This offloads the CPU-intensive decryption process from the firewall, allowing it to inspect the decrypted payload using its security policies without performing SSL/TLS termination itself.

Answer

Enable SSL proxy with certificate chaining to reduce CPU.

Answer

Use a decryption broker that sends decrypted traffic to the firewall via a virtual wire.

Answer

Deploy a forward proxy where the firewall decrypts and then re-encrypts.

Question 9

A network administrator wants to ensure that if the primary firewall fails, a secondary firewall takes over without any manual intervention. Which high availability feature is essential for this automatic failover?

Accepted Answer

Heartbeat monitoring. Heartbeat monitoring is the essential feature for automatic failover because it allows the secondary firewall to detect the primary firewall's failure through continuous health checks. When the heartbeat is lost, the secondary firewall automatically assumes the active role without manual intervention, ensuring high availability.

Answer

Session synchronization

Answer

Floating IP addresses

Answer

Preemptive mode

Question 10

A company deploys a Palo Alto Networks firewall in a cloud environment using the VM-Series. The firewall must scale to handle traffic spikes. Which architectural approach provides the best elasticity and management simplicity?

Accepted Answer

Use a VM-Series firewall with auto-scaling group and integration with Panorama.. Option D is correct because using a VM-Series firewall with an auto-scaling group and integration with Panorama provides the best elasticity and management simplicity. Auto-scaling dynamically adjusts the number of firewall instances based on traffic load, while Panorama centralizes configuration, policy management, and monitoring, eliminating the need for manual per-instance management. This approach aligns with cloud-native principles for scaling and operational efficiency.

Answer

Deploy multiple VM-Series firewalls in active/active HA with a virtual load balancer.

Answer

Use a single large VM-Series instance.

Answer

Combine physical and virtual firewalls with a shared configuration.

Question 11

A security engineer must ensure that all traffic from a specific branch office to the internet is inspected by the company's Palo Alto firewall before reaching the internet. However, the branch office has a local router that routes directly to the ISP. What architectural change is required to enforce this?

Accepted Answer

Route all traffic from the branch to the hub site through a VPN tunnel where the firewall is located.. Option A is correct because it describes a hub-and-spoke VPN topology where all branch office traffic is tunneled to a central hub site that hosts the Palo Alto firewall. This ensures the firewall can inspect all outbound traffic before it reaches the internet, bypassing the branch's direct ISP route. The VPN tunnel (e.g., IPsec) forces traffic through the firewall at the hub, providing centralized security enforcement without requiring a local firewall at the branch.

Answer

Use global VPN to backhaul all traffic to the data center.

Answer

Install a Palo Alto firewall at the branch office and configure policy-based forwarding.

Answer

Configure NAT on the branch router to force traffic through the firewall.

Question 12

Which three components are part of the Palo Alto Networks Next-Generation Firewall architecture? (Choose three.)

Accepted Answer

Application ID engine. The Application ID engine is a core component of Palo Alto Networks Next-Generation Firewall architecture because it performs deep packet inspection to identify applications regardless of port, protocol, or encryption. This allows the firewall to apply security policies based on the application identity rather than traditional port-based rules, enabling granular control over traffic.

Answer

Policy optimizer

Answer

GlobalProtect VPN

Question 13

A company is designing a high availability deployment and wants to minimize downtime. Which two configurations are required for session failover? (Choose two.)

Accepted Answer

Ensure both firewalls have identical security policies.. Session failover requires that the passive firewall can take over active sessions without interruption. Identical security policies (Option B) ensure that the same rules apply to traffic after failover, preventing asymmetric policy drops. Session synchronization (Option C) copies session state from the active to the passive firewall, so the passive unit has the exact session table needed to continue forwarding traffic seamlessly.

Answer

Set the HA mode to active/active.

Answer

Configure the same HA firewall link IP address on both firewalls.

Answer

Enable gratuitous ARP on the passive firewall.

Question 14

A security architect is evaluating the VM-Series firewall for a private cloud deployment. Which three features are specific to the VM-Series that differentiate it from physical Palo Alto firewalls? (Choose three.)

Accepted Answer

Support for VMware NSX integration. Option A is correct because VMware NSX integration is a VM-Series-specific capability that allows the virtual firewall to be managed as part of the NSX fabric, using NSX Service Insertion and distributed firewall rules. This integration is not available on physical Palo Alto Networks firewalls, which rely on hardware-based network interfaces and cannot be inserted into a software-defined network overlay.

Answer

Hardware-based flow acceleration

Answer

Dedicated SSL decryption ASIC

Question 15

Refer to the exhibit. A network engineer executes the "show system info" command and sees the above output. Based on the model and PAN-OS version, which of the following is true about this firewall?

Accepted Answer

It supports maximum sessions of 5 million.. The output shows a PA-5250 firewall running PAN-OS 9.1.3. The PA-5250 is a high-end chassis-based platform that supports up to 5 million concurrent sessions, making option D correct. This session limit is a hardware specification of the PA-5200 series, not determined by the PAN-OS version alone.

Answer

It has redundant power supplies.

Answer

It supports a maximum of 10 virtual systems.

Answer

It can be upgraded to PAN-OS 11.0 directly without an intermediate version.

PCNSA Palo Alto Networks Platforms and Architecture Practice Test 4 — 15 Questions

Exhibit

PCNSA Palo Alto Networks Platforms and Architecture Practice Test 4 — 15 Questions

Exhibit