20+ practice questions focused on Securing Traffic — one of the most tested topics on the Palo Alto Networks Certified Network Security Administrator PCNSA exam. Each question includes a detailed explanation so you learn why the right answer is correct.
Start Securing Traffic PracticeWhich TWO are valid methods to decrypt SSL/TLS traffic on a Palo Alto Networks firewall? (Choose two.)
Explanation: SSL Inbound Inspection and SSL Forward Proxy are the two valid methods for decrypting SSL/TLS traffic on a Palo Alto Networks firewall. SSH Proxy decrypts SSH traffic, not SSL/TLS. IPsec Decryption is not applicable to SSL/TLS, and Decryption Mirror is a monitoring tool, not a decryption method.
An organization has a security policy that allows all traffic from the corporate user zone to the internet, but they want to block access to social media sites only for a specific group of users in the HR department. What is the best approach?
Explanation: It uses User-ID to dynamically identify HR users, specifies the source zone corporate and the application social-media, and places the deny rule before the allow rule. This ensures that traffic from HR users to social media is blocked by the deny rule, while all other traffic matches the subsequent allow rule. Option A is wrong because the allow rule is placed first, so all traffic including HR users to social media will match the allow rule and be permitted, making the deny rule ineffective. Additionally, it does not explicitly use User-ID to identify HR users. Option B places the deny rule before the allow rule (correct order), but it is wrong because it does not specify the source zone (corporate) and may rely on a static user group rather than dynamic User-ID identification. Without the source zone, the rule could apply to traffic from other zones, potentially causing unintended blocking, and it may not correctly identify the HR users. Option C uses User-ID and correct conditions, but places the deny rule after the allow rule. Due to top-down rule evaluation, the allow rule matches first, permitting access to social media for all users, so the deny rule never applies.
Based on the exhibit, what will happen to an HTTPS request from an untrust zone user to destination IP 10.1.1.50?
Explanation: The rule 'Allow_Web' permits traffic matching service tcp/443 from any source. An HTTPS request to 10.1.1.50 uses tcp/443, so it matches the rule and is allowed. Option D is also true because HTTPS corresponds to application ssl, but the rule's service match is explicit; however, the question's intended correct answer is C as it directly references the service match. The previous explanation incorrectly stated that option D was wrong due to source being 'any,' which is not relevant.
A network engineer is troubleshooting a drop in traffic from a critical application. The traffic is allowed by the security policy, but the firewall is dropping the packets. The engineer views the session log and sees that the session is being terminated due to 'tcp-non-syn'. What is the most likely cause?
Explanation: When a firewall sees a non-SYN TCP packet without having seen the initial SYN, it cannot validate the TCP three-way handshake state. This typically occurs with asymmetric routing, where the SYN traverses one firewall and subsequent packets arrive at a different firewall that lacks the session state. The firewall drops these packets with the 'tcp-non-syn' reason because it has no corresponding session entry to associate them with.
An organization wants to prevent data exfiltration via DNS tunneling. Which security profile should be applied to the outbound DNS traffic?
Explanation: DNS Security profile is specifically designed to detect and block DNS tunneling, which is a technique used to exfiltrate data by encoding it within DNS queries and responses. By inspecting DNS traffic for anomalies such as high query rates, unusual domain names, or non-standard record types, the DNS Security profile can identify and prevent data exfiltration attempts. Other security profiles do not have the specialized DNS-layer inspection capabilities required to counter this threat.
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Practice all Securing Traffic questions1. Baseline your knowledge
Start with 10 questions to gauge your current understanding of Securing Traffic. This tells you whether you need a concept refresher or just practice.
2. Review every explanation
For each question — right or wrong — read the full explanation. Understanding why an answer is correct is more valuable than knowing the answer itself.
3. Focus on exam traps
Securing Traffic questions on the PCNSA frequently use trap wording. Look for subtle differences in answers that test your precision, not just general knowledge.
4. Reach 80% consistently
Do repeated sessions until you score 80%+ three times in a row. Then move to mixed-mode practice to test cross-topic recall under realistic conditions.
The exact number varies per candidate. Securing Traffic is tested as part of the Palo Alto Networks Certified Network Security Administrator PCNSA blueprint. Practicing with targeted Securing Traffic questions ensures you can handle any format or difficulty that appears.
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Difficulty is subjective, but Securing Traffic is a high-priority exam concept tested in multiple ways — direct recall, scenario analysis, and command-output interpretation. Consistent practice is the best way to build confidence.
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