JNCIA-SEC Junos OS Security Objects Practice Question
You are troubleshooting a connectivity issue where SIP VoIP calls are establishing control sessions, but audio streams (RTP) are failing. Which Junos security feature must be properly configured or enabled to resolve this?
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
✓
SIP Application Layer Gateway (ALG)
SIP uses dynamic ports for RTP streams, requiring the SIP ALG to be active and operational.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
SCREEN options with UDP flood protection
Why it's wrong here
UDP flood protection would drop packets indiscriminately if triggered, but SIP/RTP failure is typically an ALG issue.
- ✗
Global address book entry for RTP ports
Why it's wrong here
Address books do not control dynamic port allocations.
- ✓
SIP Application Layer Gateway (ALG)
Why this is correct
The SIP ALG parses SIP signaling to dynamically open pinholes for RTP media streams.
- ✗
TCP proxy enabled on the security zone
Why it's wrong here
SIP and RTP operate over UDP primarily, and TCP proxy is unrelated to SIP media handling.
Visual reference
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.