JNCIA-SEC Security Policies Practice Question
An enterprise network has multiple virtual routers configured within separate routing instances. How do security policies interact with traffic passing between two different routing instances on the same SRX device?
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 zones and policies are evaluated when traffic crosses between routing instances if the interfaces belong to different security zones.
Traffic between different routing instances must traverse security zones and policies, and interfaces in each instance must be assigned to appropriate zones.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Routing instances handle all security enforcement natively without policy intervention.
Why it's wrong here
Incorrect. Routing instances handle layer 3 forwarding, not security policy enforcement.
- ✗
Security policies are completely bypassed for traffic within the same physical device regardless of routing instances.
Why it's wrong here
Incorrect. Routing instances do not bypass security policies if zones are crossed.
- ✗
Only global policies apply to multi-instance routing environments.
Why it's wrong here
Incorrect. Zone-based policies apply as long as source and destination zones are defined.
- ✓
Security zones and policies are evaluated when traffic crosses between routing instances if the interfaces belong to different security zones.
Why this is correct
Correct. Inter-instance traffic that crosses security zones is subject to security policy evaluation.
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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.