PCNSE
Free Palo Alto Networks Certified Network Security Engineer Practice Test
12 exam-style questions with full explanations — no sign-up. Score yourself, then close your gaps with the full course.
Exam fee ~$1756 exam domainsLevel Advanced2 timed practice tests in the course
✅ Free practice — no sign-up📝 Real exam-style questions💡 Detailed explanations💸 30-day money-back via Udemy
A network architect must insert a Palo Alto Networks firewall between an existing core switch and edge router to enable App-ID, Content-ID, and threat prevention, but the customer's change window prohibits any IP address or routing changes to the existing topology. Which interface deployment mode BEST meets these requirements?
Virtual wire binds two interfaces together so the firewall passes traffic transparently at Layer 1/2 without requiring any IP addressing or routing changes, while still allowing full App-ID, Content-ID, User-ID, and threat prevention inspection inline.
A company must decrypt outbound HTTPS traffic on the firewall to inspect for threats, but cannot tolerate certificate-trust warnings on any of its 5,000 managed Windows endpoints. Which approach BEST meets this requirement?
Using a subordinate CA issued by the enterprise root CA means the firewall-generated certificates chain to a CA already trusted by managed endpoints (via GPO/AD), so no browser warnings appear and outbound SSL Forward Proxy decryption works transparently.
A financial services company wants unknown executable files traversing the firewall to be uploaded to a cloud-based sandbox for dynamic behavioral analysis, receiving a verdict of malicious, grayware, phishing, or benign within minutes. Which Palo Alto Networks subscription provides this capability?
WildFire uploads unknown files to a cloud (or WF-500 appliance) sandbox, executes them in a virtual environment, and returns a verdict; new signatures generated from the analysis are then distributed globally.
A Panorama template stack contains three templates: 'Base-Network', 'Region-EU', and 'Site-London', listed in that order from top to bottom in the stack. Both 'Base-Network' and 'Site-London' configure the same NTP server address with different values. Which setting is pushed to the firewall assigned to this stack?
In a Panorama template stack, the order of the templates determines precedence for overlapping configuration. The template positioned highest (closest to the top) in the stack list wins conflicts, so 'Base-Network' overrides 'Site-London' for the duplicated NTP setting.
A network security engineer needs to upgrade a firewall running PAN-OS 10.1.6 to PAN-OS 11.1.2. Which upgrade path is correct?
PAN-OS requires sequential download/install of the base image for each intermediate feature release between the current and target versions before installing the final target release; skipping feature-release base images is not supported and will fail dependency checks.
A firewall administrator is troubleshooting a connectivity issue. The Traffic log shows the session end reason as 'policy-deny', yet the administrator confirms a Security policy rule permitting this traffic exists near the top of the rulebase, above the deny-all rule. What is the MOST likely explanation?
PAN-OS performs an initial policy lookup based on port/protocol, then re-evaluates the session once App-ID completes identification. If the identified application matches a more specific rule with a deny action, the session is torn down with 'policy-deny' even though an earlier port-based rule appeared to allow it. This App-ID re-match behavior is a classic PCNSE troubleshooting scenario.
A SOC wants to evaluate a new Palo Alto Networks firewall's threat detection accuracy by connecting it to a SPAN port on a core switch. The firewall must not be able to drop or modify any production traffic during this evaluation. Which interface type should be configured?
Tap interfaces connect to a switch SPAN/mirror port and provide passive, out-of-band visibility into traffic for App-ID and threat detection reporting only — the firewall cannot block, drop, or modify traffic in this mode.
Internal users on the corporate LAN resolve an internal server's FQDN to its public NAT IP address (split-horizon DNS is not used), and must reach that server successfully from inside the network. Which NAT configuration BEST satisfies this requirement?
U-Turn NAT handles the case where internal clients request the public IP of an internal resource. The rule matches traffic with source zone = internal and original destination = public IP, then translates the destination to the server's private IP while keeping both zones internal, allowing correct routing back through the firewall.
An administrator wants to identify and block DNS queries generated by malware using domain generation algorithms (DGA) to reach command-and-control infrastructure. Which subscription supplies the intelligence needed to dynamically categorize and block these domains?
DNS Security provides cloud-delivered, machine-learning-based analysis that dynamically categorizes malicious domains, including those generated via DGA algorithms and DNS tunneling attempts.
Panorama manages a device group hierarchy where 'Branch-FW-01' is a child of the parent device group 'Global', and both device groups plus the Shared location contain pre-rulebase security rules. In which order does the firewall evaluate these pre-rules after Panorama pushes the configuration?
Panorama's rule evaluation order for pre-rulebases is Shared first, then the device group hierarchy from the topmost parent down to the most specific child device group. So Shared runs first, then 'Global' (parent), then 'Branch-FW-01' (child), followed later by local firewall rules and then post-rules in reverse order.
Two PA-5450 firewalls are deployed in an active/active HA pair to handle asymmetric traffic flows across two ISPs. Which mechanism ensures that return traffic for a session is delivered to the firewall that owns that session when asymmetric routing sends the packets to the wrong peer?
In active/active HA, the HA3 link is a dedicated dataplane link used specifically to forward packets between peers so the non-owner firewall can hand off received packets to the actual session owner, which is required to handle asymmetric routing.
An administrator wants to identify which stage of the single-pass packet processing pipeline is dropping packets, using global drop counters rather than a full packet capture. Which CLI command should be used?
'show counter global filter delta yes' displays incrementing global packet/session counters (e.g., flow_policy_deny, flow_fwd_l3_noroute) since the last invocation, letting the administrator pinpoint the exact processing stage responsible for drops without running a full packet capture.
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How much does the PCNSE exam cost?
The exam fee is approximately $175 and varies by region — confirm current pricing with the certification vendor before you book.
What topics are on the exam?
It covers 6 domains: Core Concepts (~15%), Deploy and Configure Core Components (~20%), Deploy and Configure Features and Subscriptions (~15%), Deploy and Configure Firewalls Using Panorama (~15%), Manage and Operate (~20%), Troubleshooting (~15%). The full course has a dedicated chapter, lab and practice-test coverage for each.
Is this practice test really free?
Yes — all questions on this page are free with explanations and no sign-up. The paid Udemy course adds two full-length timed exams, video lessons and hands-on labs.
Will this prepare me for the real exam?
The questions mirror the real exam's style and are mapped to the official domains. This is exam-focused preparation — combine the free test with the full course's timed simulations to gauge your readiness.