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Cisco 642-321 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: SDH Configuration and Provisioning | 25% | - Performance monitoring parameters - Path and trail provisioning - Protection switching mechanisms |
| Topic 2: SDH Equipment and Interfaces | 25% | - Optical interfaces and line rates - Electrical to optical conversion - Multiplexers, regenerators, cross-connects |
| Topic 3: Maintenance, Troubleshooting & Standards | 25% | - Alarm interpretation and fault isolation - ITU-T G.707, G.783, G.806 compliance - Error rate analysis and diagnostics |
| Topic 4: SDH Fundamentals and Architecture | 25% | - Frame structure and overhead bytes - Synchronization and timing principles - SDH standardization and hierarchy |
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