JNCIS-ENT Spanning Tree Practice Question
Which TWO statements are true regarding loop protection in RSTP? (Choose two.)
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
✓
It protects against loops caused by unidirectional link failures.
Loop protection guards against unidirectional link failures and missing BPDUs, placing the affected port into a discarding state.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
It increases the bridge priority of the local switch to maintain root status.
Why it's wrong here
Loop protection does not alter bridge priorities.
- ✗
It requires MSTP instances to be fully mapped before activation.
Why it's wrong here
Loop protection works in RSTP as well as MSTP.
- ✓
It protects against loops caused by unidirectional link failures.
Why this is correct
Unidirectional links cause BPDUs to stop arriving in one direction, which loop protection catches.
- ✓
It places a port into a discarding state if BPDUs stop arriving unexpectedly.
Why this is correct
Missing BPDUs trigger loop protection to block potential loops.
- ✗
It shuts down access ports immediately upon receiving any BPDU.
Why it's wrong here
That describes BPDU guard, not loop protection.
Visual reference
About these practice questions
This JNCIS-ENT question is part of Courseiva's 519-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.