Palo Alto PCNSC Practice Test (Legacy – exam retired 2025)

PCNSC practice test: what's covered

• Network Security Consultant

Free PCNSC sample questions

1. During a discovery workshop a customer asks the consultant to skip documentation and just deploy the NGFW quickly. Which response best reflects the Strata consultant role?

   • A. Comply and deploy a default ruleset, leaving all logging and threat profiles for the customer to enable later on their own
   • B. Capture business requirements and risk appetite, then deliver a design document, migration plan, Day-1 config and Day-2 operations handover
   • C. Forward the request to Palo Alto TAC and wait for them to perform the entire deployment under the support contract
   • D. Install the firewall in tap mode permanently so no changes can ever break production traffic during the engagement
   Show answer

   Correct: B. A consultant delivers durable value beyond a quick install because the engagement must produce documented design decisions, a tested migration path and an operations handover. Skipping docs is incorrect because operators inherit no context; deferring to TAC is wrong because TAC handles support cases, not architecture; and leaving the NGFW permanently in tap mode never enforces policy, so it is not a real deployment.

2. A consultant is preparing a handover package after a successful PAN-OS deployment so the customer's operations team can run the platform. Which artifacts belong in that package? (Choose THREE)

   • A. Network and zone diagrams with the design rationale explaining why each segmentation and decryption decision was made
   • B. An operational runbook covering common tasks, commit/push workflow, backup, and an escalation matrix for incidents
   • C. The administrator passwords printed in the body of the shared certificate so anyone can log in without onboarding
   • D. A Best Practice Assessment findings report with a prioritized hardening backlog the team can work through over time
   • E. A copy of every captured packet from the cutover window stored unencrypted on a public file share for transparency
   Show answer

   Correct: A and B and D. Good handover gives operators context, repeatable procedures and a hardening roadmap, so diagrams with rationale, a runbook with escalation, and a BPA backlog all belong. Printing admin passwords on a certificate is a serious security failure and not an artifact, whereas dumping unencrypted cutover packet captures to a public share exposes sensitive data and violates basic confidentiality, so neither is acceptable.

3. Midway through a NGFW project the customer requests a major scope change that adds SD-WAN to the original firewall-only statement of work. How should the consultant proceed?

   • A. Silently absorb the extra work to keep the customer happy and avoid any awkward conversation about commercial terms
   • B. Refuse outright and tell the customer SD-WAN is technically impossible on the platform they have already purchased
   • C. Raise a documented change request describing the new effort, impact on timeline and cost, and obtain sign-off before starting
   • D. Begin building the SD-WAN overlay immediately and mention the change only in the final project closure report
   Show answer

   Correct: C. Scope changes must be governed through a documented change request so timeline, cost and risk are agreed before work starts. Silently absorbing the work erodes margin and sets a precedent; refusing is wrong because SD-WAN is a supported PAN-OS feature; and building it first and disclosing later removes the customer's ability to make an informed decision, which is not professional consulting practice.

4. A customer evaluating Palo Alto against a competitor asks how Content-ID, App-ID, User-ID and URL filtering can run without stacking latency from chained engines. Which architectural concept explains this?

   • A. Each security function is a separate proxy and traffic is copied between them, which is why latency stays predictable
   • B. Single-Pass Parallel Processing inspects the packet once while all functions operate in parallel against that single scan
   • C. Traffic is routed out to a cloud scrubbing center for every function and the verdicts are merged before forwarding
   • D. Only one security function may be enabled per session, so the others are skipped to keep throughput consistently high
   Show answer

   Correct: B. Single-Pass Parallel Processing (SP3) scans traffic a single time and runs App-ID, Content-ID, User-ID and URL functions in parallel, avoiding the additive latency of chained engines. Treating each function as a separate proxy is the very serialized model SP3 avoids; cloud scrubbing every flow is not how the NGFW data plane works; and disabling all but one function would defeat the unified inspection that is the platform's value.

5. A retail customer must insert a NGFW inline between two existing Layer 2 switches without changing IP addressing, MAC tables or the routing design. Which deployment mode fits this constraint best?

   • A. Layer 3 mode with the firewall acting as the default gateway and performing routing for every connected subnet
   • B. Tap mode connected to a SPAN port so the firewall only receives a mirrored copy of the production traffic
   • C. Virtual Wire mode binding two interfaces so the firewall is transparent to neighbors with no MAC or IP change
   • D. A loopback-only management deployment where traffic is policy-based forwarded to the firewall by each switch
   Show answer

   Correct: C. Virtual Wire binds two interfaces into a transparent inline pair that forwards traffic without participating in routing or altering MAC/IP, which is exactly the constraint described. Layer 3 mode would require the firewall to route and become a gateway; tap mode is out-of-band and cannot enforce policy inline; and a loopback-only management deployment does not pass production traffic at all, so none of those meet the requirement.

Last updated: 2026-10-19

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