JNCIA-SEC Junos OS Security Objects Practice Question
Which THREE protocols typically require Application Layer Gateways (ALGs) in Junos OS to function correctly across security policies? (Choose three)
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 (Session Initiation Protocol)
FTP, SIP, and TFTP are classic examples of protocols requiring ALGs due to dynamic port negotiation.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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HTTP (Hypertext Transfer Protocol)
Why it's wrong here
Standard HTTP does not require an ALG for basic operations.
- ✓
SIP (Session Initiation Protocol)
Why this is correct
SIP requires an ALG to handle RTP media stream port negotiation.
- ✓
TFTP (Trivial File Transfer Protocol)
Why this is correct
TFTP uses dynamic UDP ports requiring an ALG.
- ✓
FTP (File Transfer Protocol)
Why this is correct
FTP requires an ALG for active/passive data channel port opening.
- ✗
SSH (Secure Shell)
Why it's wrong here
SSH operates on a single TCP port and does not use an ALG.
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.