PCNSE Securing Traffic and App-ID Practice Question
Exhibit
Refer to the exhibit. admin@PA-220> show system info | match appid appid version: 8000-7120 appid last update: 2024/10/01 03:00:00 appid packet buffer: 1024 KB appid max sessions: 500000
Refer to the exhibit. A firewall administrator is troubleshooting why some applications are not being correctly identified. The firewall is running App-ID version 8000-7120. What does the 'appid packet buffer: 1024 KB' indicate?
⚠ Common exam trap
Many exam-takers confuse the buffer size with a per-session data limit or a logging threshold, when in fact it is a temporary storage mechanism for App-ID analysis.
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 firewall can buffer up to 1024 KB of packet data for App-ID analysis.
The 'appid packet buffer: 1024 KB' indicates the maximum amount of packet payload data the firewall can buffer per session for App-ID analysis. This buffer stores the initial packets of a session so that App-ID can inspect the payload for application signatures, even if the data arrives in multiple packets. Option B correctly states this buffering capability.
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 only handle 1024 KB of packet data per session.
Why it's wrong here
The buffer is shared, not per session.
- ✓
The firewall can buffer up to 1024 KB of packet data for App-ID analysis.
Why this is correct
This buffer stores packets for deep inspection when needed.
- ✗
The firewall logs the first 1024 KB of every session for App-ID.
Why it's wrong here
The buffer is for analysis, not logging.
- ✗
The firewall offloads App-ID processing to a dedicated buffer of 1024 KB.
Why it's wrong here
There is no offloading; the buffer is on the firewall.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.