JNCIA-SEC Security Policies Practice Question
You are configuring a security policy that needs to reference an address prefix that includes both IPv4 and IPv6 addresses. How should you handle this in Junos OS security address books?
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
✓
Define separate address book entries for IPv4 and IPv6, as address entries are specific to an IP version.
Address books can contain both IPv4 and IPv6 entries, but separate address entries or matching structures are typically defined per IP family within the address book.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Combine IPv4 and IPv6 addresses into a single address entry string separated by a comma.
Why it's wrong here
Incorrect. Address book entries accept single IP prefixes or ranges of the same IP version.
- ✓
Define separate address book entries for IPv4 and IPv6, as address entries are specific to an IP version.
Why this is correct
Correct. Junos address book entries specify IP prefixes that are either IPv4 or IPv6.
- ✗
Configure the address book under the [edit security inet6] hierarchy only.
Why it's wrong here
Incorrect. Address books reside under general security or zone hierarchies.
- ✗
Use dual-stack address translation objects.
Why it's wrong here
Incorrect. Dual-stack NAT is for translation, not address book definition.
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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.