JNCIP-ENT Layer 2 Authentication And Access Control Practice Question
Which statement is true regarding the behavior of the supplicant mode 'single' on an EX Series switch port?
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
✓
Only one supplicant is allowed on the port; if a second device connects, it is blocked or unauthenticated.
Single-supplicant mode allows only a single authenticated client on the port. If a hub or IP phone with a PC is connected, only one device passes authentication.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Only one supplicant is allowed on the port; if a second device connects, it is blocked or unauthenticated.
Why this is correct
Correct. Single mode restricts the port to one authenticated client.
- ✗
It allows up to 256 MAC addresses to authenticate simultaneously via MAC RADIUS.
Why it's wrong here
Incorrect. Single mode restricts client counts strictly to one.
- ✗
Multiple supplicants are allowed, but they must all share the same VLAN and credentials.
Why it's wrong here
Incorrect. That describes shared multi-supplicant features.
- ✗
It enables multi-domain authentication for voice and data devices.
Why it's wrong here
Incorrect. Multi-domain is a distinct mode.
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.