JNCIS-ENT IS IS Practice Question
When using authentication in IS-IS, where can you apply the password?
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
✓
At both the interface and global levels.
IS-IS authentication can be applied to the interface level or the global level (area/domain).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
At both the interface and global levels.
Why this is correct
Junos allows authentication at either level.
- ✗
Only on the loopback interface.
Why it's wrong here
Loopback interfaces are not used for adjacency authentication.
- ✗
Only at the global level.
Why it's wrong here
Interface authentication is supported.
- ✗
Only at the interface level.
Why it's wrong here
Global authentication is also supported.
About these practice questions
This JNCIS-ENT question is part of Courseiva's 506-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 JNCIS-ENT 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 JNCIS-ENT exam.