JNCIA-SEC Network Address Translation Practice Question
When configuring advanced NAT scenarios on Junos OS, which THREE statements regarding NAT and security policies are correct? (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
✓
Security policies for Source NAT evaluate the pre-translation internal source IP address.
Security policies evaluate post-destination NAT IPs, pre-source NAT IPs, and require correct zone mappings.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Security policies for Source NAT evaluate the pre-translation internal source IP address.
Why this is correct
Policies check source IP before source NAT translates it.
- ✗
Security policies automatically override NAT rule evaluation order if a conflict arises.
Why it's wrong here
Policies and NAT rule-sets operate independently in separate pipeline stages.
- ✗
Security policies are evaluated before any NAT processing occurs on the SRX device.
Why it's wrong here
Destination NAT is evaluated before security policies for inbound flows.
- ✓
Security policies for Destination NAT evaluate the post-translation internal destination IP address.
Why this is correct
Policies check destination IP after destination NAT has translated it.
- ✓
Security policies must reference the security zones corresponding to the pre-NAT and post-NAT egress/ingress paths correctly.
Why this is correct
Zone matching in policies must align with the actual security zones traversed by the packet flow.
Visual reference
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This JNCIA-SEC question is part of Courseiva's 513-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.