PCNSA App-ID and Content-ID Practice Question
Which TWO statements about App-ID are correct? (Choose two.)
⚠ Common exam trap
Palo Alto Networks often tests the misconception that App-ID relies on port numbers, tempting candidates to select option C, but the correct understanding is that App-ID is port-agnostic and uses multiple deeper inspection methods.
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 can identify applications even if they use standard ports for other services.
App-ID uses multiple identification mechanisms—including application signatures, SSL/TLS fingerprinting, and behavioral analysis—to identify applications regardless of the port they use. This means an application like SSH running on TCP 443 (typically used for HTTPS) will still be correctly identified as SSH, not as web-browsing traffic.
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 can identify applications even if they use standard ports for other services.
Why this is correct
App-ID decodes traffic regardless of port.
- ✗
App-ID is only effective for well-known commercial applications.
Why it's wrong here
App-ID identifies many types of applications.
- ✗
App-ID primarily identifies applications based on port numbers.
Why it's wrong here
App-ID uses multiple methods beyond ports.
- ✓
App-ID uses signatures to identify known applications.
Why this is correct
Signatures are a primary method.
- ✗
App-ID requires at least 10 packets to identify an application.
Why it's wrong here
App-ID can identify with the first few packets.
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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.