JNCIS-ENT Layer 2 Security Practice Question

Which Junos configuration command enables Dynamic ARP Inspection (DAI) for a specific VLAN named 'VLAN10'?

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

✓

set ethernet-switching-options secure-access-port vlan VLAN10 arp-inspection

DAI is enabled under ethernet-switching-options secure-access-port vlan for the specific VLAN name.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✗
set protocols arp-inspection vlan VLAN10
Why it's wrong here
There is no protocols arp-inspection hierarchy in Junos.
✓
set ethernet-switching-options secure-access-port vlan VLAN10 arp-inspection
Why this is correct
This command correctly enables DAI on the specified VLAN under secure-access-port.
✗
set vlans VLAN10 dynamic-arp-inspection
Why it's wrong here
DAI is configured under secure-access-port options, not directly under the vlans hierarchy.
✗
set interfaces vlan unit 10 family inet arp-inspection
Why it's wrong here
DAI operates at Layer 2 and is configured under ethernet-switching-options.

Visual reference

About these practice questions

This JNCIS-ENT question is part of Courseiva's 506-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 →

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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.