JNCIA-SEC Junos OS Security Objects Practice Question
You need to inspect traffic matching a proprietary application that uses dynamic TCP ports. You have written a custom application. What additional Junos security feature can be combined with custom applications to inspect deep packet content for non-standard ports?
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
✓
Application Identification (AppID) / Custom signatures
Custom applications combined with Junos AppSecure (such as AppID) or custom ALG mappings allow deeper inspection, though basic custom apps define port/protocols. For dynamic ports, AppID signatures are used.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Global address sets
Why it's wrong here
Address sets group IP addresses, not application payloads.
- ✓
Application Identification (AppID) / Custom signatures
Why this is correct
AppID and custom signatures inspect traffic payload regardless of static port assignments.
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Host-inbound traffic protocols
Why it's wrong here
Host-inbound traffic controls traffic destined for the SRX routing engine itself.
- ✗
Screen options profile
Why it's wrong here
Screen options detect layer 3/4 flood and spoofing attacks, not application signatures.
About these practice questions
This JNCIA-SEC question is part of Courseiva's 520-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 and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Juniper Networks exam blueprint
This JNCIA-SEC practice question is part of Courseiva's free Juniper 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 JNCIA-SEC exam.