JNCIA-SEC Network Address Translation Practice Question
Which Junos configuration command displays the active NAT translation mappings and session details for a specific source IP address?
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
✓
show security flow session match source-prefix 192.168.1.50
To inspect active sessions matching a specific source IP address to verify NAT, 'show security flow session match source-prefix <ip>' is 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.
- ✗
show security nat translation match 192.168.1.50
Why it's wrong here
Invalid operational command syntax in Junos OS.
- ✓
show security flow session match source-prefix 192.168.1.50
Why this is correct
This command filters active flow sessions by source IP, displaying pre-NAT and post-NAT addresses.
- ✗
show route forwarding-table source 192.168.1.50
Why it's wrong here
Forwarding tables show routing paths, not active NAT session translations.
- ✗
show system nat sessions source 192.168.1.50
Why it's wrong here
Invalid Junos command.
Visual reference
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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.