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Exam Code: JN0-400

Exam Name: EX, Associate (JNCIA-EX)

Updated: Aug 27, 2026

Number: 120 Q&As with Testing Engine

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Juniper JN0-400 Exam Overview:

Certification Vendor:	Juniper Networks
Exam Name:	EX, Associate (JNCIA-EX)
Exam Number:	JN0-400
Related Certifications:	JNCIE-ENT JNCIS-ENT JNCIP-ENT
Certificate Validity Period:	3 years
Exam Price:	$200 USD
Real Exam Qty:	65
Available Languages:	English
Passing Score:	Variable (approximately 65-70%, not officially published)
Exam Duration:	90 minutes
Exam Format:	Scenario-based, Multiple Choice
Recommended Training:	Juniper TechLibrary Junos Enterprise Switching (JEX)
Exam Registration:	Pearson VUE Registration Juniper Certification Page
Sample Questions:	Juniper JN0-400 Sample Questions
Exam Way:	Delivered by Pearson VUE; available at test centers or online proctored
Pre Condition:	No mandatory prerequisites; basic networking knowledge recommended
Official Syllabus URL:	https://www.juniper.net/us/en/training/certification.html

Juniper JN0-400 Exam Syllabus Topics:

Section	Weight	Objectives
User Interfaces	20%	- Configuration hierarchy - CLI modes and navigation - Commit, rollback, and rescue configuration
Junos OS Fundamentals	15%	- Software installation and upgrades - Routing Engine and Packet Forwarding Engine - Junos architecture, control/forwarding planes
Configuration Basics	20%	- Interface configuration and monitoring - System settings and user management - Management access and services
System Monitoring & Maintenance	10%	- Basic troubleshooting methodology - Log and event monitoring - Show and diagnostic commands
Networking Fundamentals	15%	- IPv4/IPv6 addressing and subnetting - Broadcast and collision domains - Ethernet and switching concepts
Layer 2 Switching Technologies	20%	- Spanning Tree Protocol - Port security and storm control - Link Aggregation (LAG) - VLANs and trunking

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