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Cisco 642-661 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: BGP Fundamentals | 20% | - BGP session establishment and states - BGP peering configuration - BGP characteristics and operation - BGP message types and formats |
| Topic 2: BGP Path Attributes & Route Selection | 25% | - Weight, Local Preference, AS-Path, Origin, MED - Well-known and optional attributes - Communities and extended communities - BGP route selection process |
| Topic 3: Scaling BGP Networks | 20% | - Peer groups and peer sessions - Route reflectors and cluster lists - Route aggregation and summarization - Route dampening - BGP confederations |
| Topic 4: BGP Policy Control & Filtering | 25% | - Prefix lists and distribute lists - Outbound Route Filtering (ORF) - AS-Path filters and regular expressions - Route maps and policy modification |
| Topic 5: Multihoming & Advanced BGP | 10% | - Single/multiple ISP connectivity - Private AS number handling - BGP troubleshooting and monitoring |
