JNCIA-SEC Network Address Translation Practice Question
You are auditing a Junos security device configuration. You observe multiple Static NAT rules configured across different rule sets. One of the rules uses the 'off-path' or similar specialized handling? Wait, you recall Junos Static NAT rule configuration details. Which statement correctly describes how Junos Static NAT handles bi-directional traffic flow without requiring separate source NAT rules?
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
✓
Static NAT automatically provides bidirectional translation, handling both inbound destination translation and outbound source translation implicitly.
Static NAT in Junos OS is inherently bidirectional. When you configure a static NAT rule mapping a public IP to a private IP, the SRX automatically creates both the destination NAT translation for inbound traffic and the source NAT translation for outbound traffic initiated by the internal host.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Static NAT automatically provides bidirectional translation, handling both inbound destination translation and outbound source translation implicitly.
Why this is correct
Junos Static NAT inherently translates inbound destination IPs and outbound source IPs without requiring separate source NAT rules.
- ✗
Static NAT rules must be bound to a security ALG to function bidirectionally.
Why it's wrong here
ALGs are only needed for complex protocols embedding IP addresses in payloads (like FTP/SIP), not for basic bidirectional static NAT.
- ✗
Static NAT requires proxy ARP for inbound traffic and static routing tables for outbound traffic translation.
Why it's wrong here
Outbound translation is handled automatically by the flow session state created by the static NAT mapping.
- ✗
Static NAT only handles inbound traffic; outbound traffic from the internal host must always be matched by a separate Source NAT pool rule.
Why it's wrong here
Static NAT is bidirectional; outbound traffic from the static NAT host is automatically translated to the public static IP.
Visual reference
About these practice questions
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.