JNCIP-ENT IP Telephony Features Practice Question
Which THREE conditions must be met for an EX Series switch to successfully supply PoE power to an attached IP phone? (Choose three.)
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
✓
PoE must not be disabled on the specific switch interface.
PoE delivery requires physical power availability, correct hardware classification/detection, and administrative enablement on the port.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
PoE must not be disabled on the specific switch interface.
Why this is correct
Interfaces with PoE explicitly disabled will not provide power.
- ✓
The physical Ethernet cable must have all four pairs intact and functional for standard 802.3af/at delivery.
Why this is correct
PoE requires proper physical cabling continuity across power pairs.
- ✗
The switch port must be configured as a BGP peer.
Why it's wrong here
BGP routing has no bearing on physical PoE power delivery.
- ✓
The switch must have sufficient remaining PoE power budget available in its chassis power supply pool.
Why this is correct
Power cannot be delivered if the switch total power budget is exhausted.
- ✗
The IP phone must be running Junos OS.
Why it's wrong here
IP phones run their own vendor operating systems, not Junos OS.
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 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.