PCNSE Securing Traffic and App-ID Practice Question
A security administrator is reviewing traffic logs and notices that a known application is being identified as 'web-browsing' instead of its correct App-ID. The application uses HTTP and is not encrypted. The administrator confirms that the application is not a custom application. What is the most likely cause of this misidentification?
⚠ Common exam trap
The trap here is assuming that all HTTP applications have unique App-ID signatures, when many web-based applications are simply classified as web-browsing.
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
✓
The application uses standard HTTP and does not have a unique signature, so the firewall defaults to 'web-browsing'.
App-ID identifies applications based on unique traffic patterns. If an application uses standard HTTP and lacks a distinct signature, the firewall may classify it as 'web-browsing' because it matches that generic App-ID. This is the most likely cause in the absence of custom configurations. Other options involve less probable scenarios like outdated databases or overrides.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The firewall's App-ID database is outdated and does not have the signature for the application.
Why it's wrong here
An outdated App-ID database could cause misidentification, but the application is known and uses HTTP, so it is likely already in the database. The more common cause is that the application's traffic pattern resembles web-browsing. Updating the database may not resolve the issue if the signature is already present. This option is less likely than the correct answer.
- ✗
The application's traffic is being tunneled over HTTP and the firewall cannot distinguish it from web-browsing.
Why it's wrong here
If the application is tunneled over HTTP, the firewall might initially see it as web-browsing, but App-ID should eventually detect the tunneled application if signatures exist. However, the scenario states it's a known application using HTTP, not necessarily tunneled. This option is plausible but not the most direct cause; misidentification often occurs when the application uses standard HTTP without unique signatures.
- ✓
The application uses standard HTTP and does not have a unique signature, so the firewall defaults to 'web-browsing'.
Why this is correct
If an application uses standard HTTP and does not have a distinct signature, the firewall may identify it as 'web-browsing' because it matches the web-browsing App-ID. This is the correct answer because App-ID relies on unique patterns; without them, the firewall falls back to the generic web-browsing classification. This is a common scenario for applications that are essentially web-based but lack specific signatures.
- ✗
The firewall is configured with an Application Override for HTTP that forces all HTTP traffic to be identified as web-browsing.
Why it's wrong here
An Application Override for HTTP would force all HTTP traffic to be identified as web-browsing, but the scenario does not mention such a configuration. This option is incorrect because it assumes a specific misconfiguration that is not stated. While possible, it is less likely than the natural behavior of App-ID when no unique signature exists.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Palo Alto Networks exam blueprint
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.