JNCIP-ENT Ethernet Switching And Spanning Tree Practice Question
You need to design a scalable Layer 2 architecture across multiple data center buildings using Juniper switches, avoiding single points of failure while preventing bridging loops. Which scaling mechanism allows Active-Active multihoming without running Spanning Tree Protocol across the core?
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
✓
Multi-Chassis Link Aggregation (MC-LAG) with ICCP
MC-LAG (Multi-Chassis Link Aggregation Group) or EVPN-VXLAN provides active-active multihoming and eliminates spanning tree loops. Among traditional Layer 2 tools, MC-LAG is the direct multi-chassis active-active solution.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Layer 2 Tunneling Protocol (L2TPv3) bridging
Why it's wrong here
L2TPv3 is a tunneling protocol typically used for pseudowires over IP, not direct campus scaling.
- ✓
Multi-Chassis Link Aggregation (MC-LAG) with ICCP
Why this is correct
MC-LAG uses ICCP to coordinate forwarding between two peer switches, enabling active-active uplinks without STP loops.
- ✗
Rapid PVST+ with root guard on all access ports
Why it's wrong here
Rapid PVST+ still relies on Spanning Tree Protocol and blocks links.
- ✗
Virtual Chassis with spanning-tree disabled
Why it's wrong here
Disabling spanning tree entirely risks bridging loops if misconfigured.
Visual reference
About these practice questions
This JNCIP-ENT question is part of Courseiva's 332-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 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.