Juniper JN0-400 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Layer 2 Switching Technologies | 20% | - VLANs and trunking - Link Aggregation (LAG) - Port security and storm control - Spanning Tree Protocol |
| Topic 2: Junos OS Fundamentals | 15% | - Routing Engine and Packet Forwarding Engine - Junos architecture, control/forwarding planes - Software installation and upgrades |
| Topic 3: System Monitoring & Maintenance | 10% | - Log and event monitoring - Show and diagnostic commands - Basic troubleshooting methodology |
| Topic 4: Networking Fundamentals | 15% | - Ethernet and switching concepts - Broadcast and collision domains - IPv4/IPv6 addressing and subnetting |
| Topic 5: Configuration Basics | 20% | - Interface configuration and monitoring - System settings and user management - Management access and services |
| Topic 6: User Interfaces | 20% | - CLI modes and navigation - Configuration hierarchy - Commit, rollback, and rescue configuration |














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