Cisco 642-321 : Cisco Optical SDH Exam (SDH)

642-321 real exams

Exam Code: 642-321

Exam Name: Cisco Optical SDH Exam (SDH)

Updated: Sep 17, 2026

Q & A: 59 Questions and Answers

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Cisco 642-321 Exam Syllabus Topics:

SectionObjectives
Cisco Optical Networking Solutions- Cisco optical platforms
  • 1. Cisco ONS 15216 platform
  • 2. Hardware components and modules
  • 3. Cisco ONS 15454 SDH system
Operations and Maintenance- System operation
  • 1. Fault isolation and troubleshooting
  • 2. Alarm management
  • 3. Performance monitoring
Protection and Network Management- Protection mechanisms
  • 1. Ring and linear protection
  • 2. Redundancy and restoration
  • 3. Network management and administration
Provisioning and Configuration- Service provisioning
  • 1. Bandwidth allocation
  • 2. Circuit creation and management
  • 3. Cross-connect configuration
SDH Fundamentals- SDH architecture and concepts
  • 1. Frames and multiplexing principles
  • 2. SDH hierarchy and terminology
  • 3. Network elements and interfaces

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Cisco Related Exams

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    Cisco Optical SDH Exam (SDH)

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