JNCIP-ENT Class OF Service Practice Question
You are troubleshooting a scenario where multi-field classifiers and behavior aggregate classifiers are both configured on the same ingress interface. In what order does Junos process classification?
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
✓
Behavior aggregate classification is evaluated first, and multi-field classification can override the result
Junos processes Behavior Aggregate (BA) classification first, followed by Multi-Field (MF) classification which can override the BA result.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Junos rejects configurations where both BA and MF classifiers are applied to the same interface
Why it's wrong here
Both can be applied simultaneously.
- ✗
Both classifiers are executed simultaneously in hardware without precedence
Why it's wrong here
There is a strict processing order.
- ✓
Behavior aggregate classification is evaluated first, and multi-field classification can override the result
Why this is correct
BA classifies based on CoS bits; MF filters can subsequently override the class.
- ✗
Multi-field classification is evaluated first, followed by behavior aggregate classification
Why it's wrong here
BA is evaluated first.
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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 JNCIP-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 JNCIP-ENT exam.