PCNSA App-ID and Content-ID Practice Question
Which TWO of the following are true about App-ID? (Choose two.)
⚠ Common exam trap
Candidates often assume App-ID relies on port numbers for identification, similar to traditional firewalls, but the exam tests the understanding that App-ID is port-agnostic and uses deep packet inspection to identify applications regardless of the port used.
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
✓
App-ID identifies applications regardless of port.
App-ID is designed to identify applications based on their unique traffic behavior, not just port numbers. By using signatures, protocol decoding, and behavioral analysis, App-ID can accurately detect applications even when they are running on non-standard ports, such as SSH on TCP 2222 or HTTP on TCP 8080. This decoupling from port-based identification is a core strength of the Palo Alto Networks next-generation firewall.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
App-ID cannot identify custom applications.
Why it's wrong here
Custom App-ID can be created.
- ✓
App-ID identifies applications regardless of port.
Why this is correct
It is port-agnostic.
- ✓
App-ID uses signatures, protocol decoding, and behavioral analysis to identify applications.
Why this is correct
These are the three main methods.
- ✗
App-ID can only identify applications on standard ports.
Why it's wrong here
App-ID is port-agnostic.
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About these practice questions
This PCNSA question is part of Courseiva's 516-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PCNSA 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 PCNSA exam.