JNCIS-ENT IS IS Practice Question
You have two routers connected via a point-to-point link. You need to ensure they form an IS-IS adjacency. Which configuration is required?
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
✓
Configure the interface as point-to-point and enable IS-IS on both routers.
On point-to-point links, IS-IS will form an adjacency regardless of the level match, provided the interface is enabled in the correct protocol hierarchy.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Configure a DIS priority on the interface.
Why it's wrong here
DIS priority is only used on broadcast segments.
- ✓
Configure the interface as point-to-point and enable IS-IS on both routers.
Why this is correct
Point-to-point links do not require a DIS election and form adjacencies simply by being enabled.
- ✗
Disable the wide-metrics setting on both ends.
Why it's wrong here
Metric style must match, but it is not a requirement for adjacency formation itself.
- ✗
Configure a unique System ID for both routers.
Why it's wrong here
System IDs must be unique, but this is a global configuration, not interface specific.
About these practice questions
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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 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.