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


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