- A
Increase the 'timeout' value for the custom application signature from 0 to 60 seconds.
Why wrong: The timeout value determines how long App-ID waits before it updates the application identification; it does not affect the initial identification process.
- B
Modify the custom application signature to use the 'tcp' protocol decoder and set the port to 8443.
Why wrong: The protocol decoder and port are already correctly configured as verified; this change is unnecessary and would not resolve the misclassification.
- C
Disable SSL decryption for the CRM traffic to allow App-ID to inspect the unencrypted HTTP headers.
Why wrong: Disabling SSL decryption would not help; it would prevent App-ID from inspecting HTTP headers in encrypted traffic, potentially making identification worse.
- D
Create a new security rule with an application override that sets the application to 'crm-app' for the CRM traffic.
An application override forces the firewall to identify the traffic as the specified application, bypassing App-ID's detection. This is a valid approach when App-ID fails to correctly classify traffic despite a properly configured custom signature.
Troubleshooting Custom Application Identification for Encrypted Traffic
This PCNSE practice question tests your understanding of securing traffic and app-id. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Dynamics Inc., a mid-sized company, uses Palo Alto Networks PA-5250 firewalls at their data center. They recently deployed a new web-based CRM application that uses HTTPS and WebSocket connections on TCP port 8443. The security team configured a custom application 'crm-app' with a signature that matches the 'Host' header in HTTP requests, and set the protocol decoder to 'tcp' and the port to 8443. The application is used in a security policy to allow traffic from internal users to the CRM server. However, after deployment, the traffic logs show the application is identified as 'ssl' instead of 'crm-app'. The firewall's App-ID and threat prevention subscriptions are active and up to date. The team has verified that the custom application signature is correctly configured, and the traffic clearly matches the defined host header. Which action should be taken to ensure the CRM traffic is correctly identified by App-ID?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Create a new security rule with an application override that sets the application to 'crm-app' for the CRM traffic.
Option D is correct because when a custom application signature fails to identify traffic due to the firewall's inability to inspect encrypted payloads (like HTTPS/WebSocket), an application override in a security rule forces App-ID to classify the traffic as the specified application regardless of the signature match. Since the CRM traffic uses HTTPS on port 8443, the firewall sees encrypted SSL/TLS handshakes and defaults to 'ssl' App-ID because it cannot inspect the encrypted HTTP headers. An application override bypasses the App-ID identification process and directly assigns the desired application, ensuring correct logging and policy enforcement.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Increase the 'timeout' value for the custom application signature from 0 to 60 seconds.
Why it's wrong here
The timeout value determines how long App-ID waits before it updates the application identification; it does not affect the initial identification process.
- ✗
Modify the custom application signature to use the 'tcp' protocol decoder and set the port to 8443.
Why it's wrong here
The protocol decoder and port are already correctly configured as verified; this change is unnecessary and would not resolve the misclassification.
- ✗
Disable SSL decryption for the CRM traffic to allow App-ID to inspect the unencrypted HTTP headers.
- ✓
Create a new security rule with an application override that sets the application to 'crm-app' for the CRM traffic.
Why this is correct
An application override forces the firewall to identify the traffic as the specified application, bypassing App-ID's detection. This is a valid approach when App-ID fails to correctly classify traffic despite a properly configured custom signature.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume a correctly configured custom application signature will always identify traffic, but they overlook that encrypted payloads (HTTPS/WebSocket) prevent the firewall from inspecting HTTP headers, making the signature ineffective without SSL decryption or an application override.
Detailed technical explanation
How to think about this question
App-ID relies on protocol decoders and signatures to identify applications, but for encrypted traffic like HTTPS, the firewall cannot see beyond the TLS handshake unless SSL decryption is configured. The 'ssl' App-ID is assigned by default when the firewall detects a TLS handshake on a non-standard port (8443) without decryption. An application override is a static mapping that forces the application classification, which is useful when decryption is not feasible or desired, but it bypasses App-ID's dynamic identification entirely.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the PCNSE exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Visual reference
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
Securing Traffic and App-ID — study guide chapter
Learn the concepts, then practise the questions
- →
Securing Traffic and App-ID practice questions
Targeted practice on this topic area only
- →
All PCNSE questions
516 questions across all exam domains
- →
Palo Alto Networks Certified Network Security Engineer PCNSE study guide
Full concept coverage aligned to exam objectives
- →
PCNSE practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related PCNSE practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Manage, Monitor and Operate practice questions
Practise PCNSE questions linked to Manage, Monitor and Operate.
Securing Traffic and App-ID practice questions
Practise PCNSE questions linked to Securing Traffic and App-ID.
Securing Users and Applications with Authentication practice questions
Practise PCNSE questions linked to Securing Users and Applications with Authentication.
Decryption and SSL Inspection practice questions
Practise PCNSE questions linked to Decryption and SSL Inspection.
Managing Troubleshooting and High Availability practice questions
Practise PCNSE questions linked to Managing Troubleshooting and High Availability.
Deploy and Configure Firewalls practice questions
Practise PCNSE questions linked to Deploy and Configure Firewalls.
Core Concepts and Architecture practice questions
Practise PCNSE questions linked to Core Concepts and Architecture.
Secure Access and VPN practice questions
Practise PCNSE questions linked to Secure Access and VPN.
Troubleshoot practice questions
Practise PCNSE questions linked to Troubleshoot.
PCNSE fundamentals practice questions
Practise PCNSE questions linked to PCNSE fundamentals.
PCNSE scenario practice questions
Practise PCNSE questions linked to PCNSE scenario.
PCNSE troubleshooting practice questions
Practise PCNSE questions linked to PCNSE troubleshooting.
Practice this exam
Start a free PCNSE practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this PCNSE question test?
Securing Traffic and App-ID — This question tests Securing Traffic and App-ID — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create a new security rule with an application override that sets the application to 'crm-app' for the CRM traffic. — Option D is correct because when a custom application signature fails to identify traffic due to the firewall's inability to inspect encrypted payloads (like HTTPS/WebSocket), an application override in a security rule forces App-ID to classify the traffic as the specified application regardless of the signature match. Since the CRM traffic uses HTTPS on port 8443, the firewall sees encrypted SSL/TLS handshakes and defaults to 'ssl' App-ID because it cannot inspect the encrypted HTTP headers. An application override bypasses the App-ID identification process and directly assigns the desired application, ensuring correct logging and policy enforcement.
What should I do if I get this PCNSE question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Keep practising
More PCNSE practice questions
- Arrange the steps to enable and configure GlobalProtect on a Palo Alto Networks firewall.
- Order the steps to upgrade the PAN-OS software on a standalone firewall.
- An administrator notices that traffic from zone A to zone B is being dropped silently. Security rules are in place. Trou…
- Which component of the PAN-OS architecture is responsible for processing security policies and performing packet inspect…
- A company has configured a security policy that allows HTTP traffic from the internal network 10.0.0.0/8 to the internet…
- An organization wants to map user identity from Active Directory for traffic coming from internal LAN users without inst…
Last reviewed: Jul 4, 2026
This PCNSE practice question is part of Courseiva's free Palo Alto Networks certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PCNSE exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.