JNCIA-SEC Network Address Translation Practice Question
An administrator configures a Source NAT pool and notices that multiple internal clients sharing the same public IP address are experiencing session disruptions with certain web applications that require consistent source ports. Which Junos feature should be enabled on the source NAT pool to ensure that a specific internal IP address always maps to the same translated public IP and port combination?
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
✓
persistent-nat
Persistent NAT ensures that a given internal source IP and port always map to the same translated public IP and port for all outbound connections, which is required for certain stateful applications.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
persistent-nat
Why this is correct
Enabling 'persistent-nat' on the source NAT pool maintains consistent port and IP mapping for sessions.
- ✗
session-stable translation
Why it's wrong here
Session stable is not a Junos NAT configuration keyword.
- ✗
source-nat deterministic-pat
Why it's wrong here
While deterministic NAT exists in some vendor equipment, Junos uses 'persistent-nat'.
- ✗
port-mapping static
Why it's wrong here
This is not the correct Junos keyword for persistent source port allocation.
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.