JNCIA-SEC Network Address Translation Practice Question
Which TWO configuration components are mandatory when defining a Source NAT rule-set in Junos OS? (Choose two)
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
✓
from zone
Source NAT rule-sets require source zones ('from zone') and destination zones ('to zone') to define scope.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
from zone
Why this is correct
A source zone is mandatory for rule-sets.
- ✗
routing-instance binding
Why it's wrong here
Routing instance binding is optional and used for virtual routers/VRFs.
- ✓
to zone
Why this is correct
A destination zone is mandatory for rule-sets.
- ✗
interface MTU specification
Why it's wrong here
MTU is configured under interface hierarchy, not NAT rule-sets.
- ✗
global ARP timeout
Why it's wrong here
ARP settings are configured under system or interface hierarchies.
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.