Palo Alto Networks NGFW Practice Test

NGFW practice test: what's covered

• Next-Generation Firewall Engineer

Free NGFW sample questions

1. A network engineer is deploying a Palo Alto Networks firewall in Virtual Wire (V-Wire) mode between a core switch and an edge router. How does V-Wire interface mode process network traffic?

   • A. Passes traffic transparently between two paired physical interfaces at Layer 2 without requiring IP address assignment or routing configuration
   • B. Assigns Layer 3 IP addresses to both interfaces and acts as an OSPF neighbor for upstream switches
   • C. Operates as an 802.1Q trunking bridge that terminates all incoming VLAN tags and routes them to a virtual router
   • D. Acts as a dedicated out-of-band management interface with web GUI access enabled by default
   Show answer

   Correct: A. Virtual Wire (V-Wire) mode pairs two physical interfaces so traffic passes transparently without requiring MAC address learning, IP addressing, or routing configuration, enabling full App-ID and Threat inspection. Option B is incorrect because Layer 3 mode requires IP addresses and routing configuration. Option C is incorrect because V-Wire is not a terminating bridge. Option D is incorrect because management interfaces are separate dedicated ports.

2. A network administrator needs to aggregate four 10GbE physical interfaces into an LACP Aggregate Group (AE) on a PA-3200 firewall. What must be configured on the firewall before adding physical interfaces to the AE group?

   • A. Set the interface type of the physical interfaces to Aggregate Ethernet and assign them to an AE Group ID
   • B. Configure an OSPF dynamic routing instance on each physical member interface individually
   • C. Enable DHCP server daemon on all member interfaces prior to bundle creation
   • D. Assign individual public IPv4 addresses to each physical port within the bundle
   Show answer

   Correct: A. To construct an Aggregate Ethernet (AE) interface bundle in PAN-OS, physical member interfaces must first have their interface type changed to Aggregate Ethernet and be assigned to a matching AE Group ID (e.g. ae1). Option B is incorrect because routing properties are configured on the parent AE interface, not individual member ports. Option C is incorrect because DHCP server is not required for bundle setup. Option D is incorrect because member ports do not take individual IP addresses.

3. A firewall engineer is creating 802.1Q subinterfaces on a Layer 3 physical interface to segregate VLAN 10 and VLAN 20. Which configuration step is mandatory for each subinterface?

   • A. Specify a unique Tag (VLAN ID) matching the 802.1Q encapsulation tag sent by the switch
   • B. Assign a static MAC address overlay from the global Panorama management pool
   • C. Enable BGP routing peering on each individual subinterface object
   • D. Configure Virtual Wire binding pairs for each VLAN subinterface
   Show answer

   Correct: A. When creating Layer 3 subinterfaces (e.g., ethernet1/1.10), specifying the Tag (VLAN ID) is mandatory so PAN-OS can correctly classify incoming 802.1Q tagged frames. Option B is incorrect because Panorama MAC overlays are not required for standard subinterface creation. Option C is incorrect because BGP dynamic routing is optional. Option D is incorrect because Virtual Wire bindings apply only to V-Wire interfaces, not Layer 3 subinterfaces.

4. A security architect is designing a deployment where the firewall conducts full security inspection without making any MAC or IP table alterations to passing packets. Which TWO interface types support this operational requirement? (Choose two.)

   • A. Virtual Wire (V-Wire) interfaces
   • B. Tap interfaces
   • C. Layer 3 subinterfaces
   • D. HA2 Data Link interfaces
   Show answer

   Correct: A and B. Virtual Wire interfaces inspect inline traffic transparently without modifying IP/MAC headers. Tap interfaces receive mirrored traffic from a switch SPAN port without altering production traffic. Option C is incorrect because Layer 3 subinterfaces rewrite Layer 2 headers during forwarding. Option D is incorrect because HA2 interfaces are dedicated data synchronization links between HA firewall peers and do not inspect transit traffic.

5. A SOC analyst needs to connect a Palo Alto Networks firewall to a core switch SPAN port to monitor enterprise network traffic passively. Which interface type must be configured on the firewall port?

   • A. Tap interface
   • B. Virtual Wire interface
   • C. Layer 2 bridge interface
   • D. HA1 control interface
   Show answer

   Correct: A. A Tap interface is designed specifically to receive mirrored out-of-band traffic from switch SPAN or mirror ports for passive monitoring and threat evaluation. Option B is incorrect because Virtual Wire is an inline transparent forwarding interface. Option C is incorrect because Layer 2 bridge interfaces forward production packets inline. Option D is incorrect because HA1 is a dedicated control link for High Availability deployment.

Last updated: 2026-10-19

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