JNCIA-SEC Network Address Translation Practice Question
Which configuration statement correctly defines a source NAT pool named 'corp-pool' with an address range from 203.0.113.10 to 203.0.113.20 on Junos OS?
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
✓
set security nat source pool corp-pool address 203.0.113.10 to 203.0.113.20
Source NAT pools are configured under 'security nat source pool <name> address <range>' using Junos CLI syntax.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
set security nat source pool corp-pool address 203.0.113.10/32 to 203.0.113.20/32
Why it's wrong here
The correct Junos CLI syntax uses address ranges without '/32 to /32' notation inside the pool definition.
- ✗
set security nat source address-pool corp-pool range 203.0.113.10-203.0.113.20
Why it's wrong here
This syntax uses invalid keywords like 'address-pool' and hyphenated ranges.
- ✓
set security nat source pool corp-pool address 203.0.113.10 to 203.0.113.20
Why this is correct
This is the exact syntax for defining a source NAT pool address range in Junos OS.
- ✗
set security nat source pool corp-pool address 203.0.113.10/28
Why it's wrong here
A subnet mask like /28 includes network and broadcast addresses, whereas explicit range or single address blocks are defined using standard range syntax.
Visual reference
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.