JNCIP-ENT Ethernet Switching And Spanning Tree Practice Question
You are configuring selective Q-in-Q stacking on an MX Series router. Unlike standard Q-in-Q where all customer VLANs are encapsulated into a single provider VLAN, selective Q-in-Q allows you to map specific customer VLAN ranges to different provider VLANs. Which configuration element enables this granularity?
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
✓
vlan-map match statement with specific input VLAN ID filters
Flexible VLAN tagging combined with 'vlan-map' statements defining match criteria allows selective Q-in-Q.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
vlan-map match statement with specific input VLAN ID filters
Why this is correct
Matching specific inner VLAN IDs enables selective Q-in-Q mapping.
- ✗
protocols l2-learning selective-stacking
Why it's wrong here
L2-learning does not manage selective Q-in-Q interface rules.
- ✗
global bridge-domain vlan-translation enable
Why it's wrong here
This global statement does not exist in Junos.
- ✗
routing-instance forwarding-options selective-qinq
Why it's wrong here
Selective Q-in-Q is configured under interfaces and bridge domains, not forwarding-options.
Visual reference
About these practice questions
One of 332 original JNCIP-ENT practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. 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 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.