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Nortel 920-124 exam : NNCDS -Ethernet Switching Exam

920-124 Exam Questions
  • Exam Code: 920-124
  • Exam Name: NNCDS -Ethernet Switching Exam
  • Updated: Aug 15, 2026
  • Q & A: 69 Questions and Answers
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Nortel 920-124 Exam Syllabus Topics:

SectionObjectives
LAN Switching Fundamentals- LAN segmentation
  • 1. VLAN concepts and usage
    • 2. Collision domains and broadcast domains
      - Switch operation principles
      • 1. Switching tables and forwarding logic
        • 2. MAC address learning and forwarding
          VLANs and Trunking- Trunking protocols
          • 1. 802.1Q tagging
            • 2. Trunk link configuration principles
              - VLAN configuration
              • 1. VLAN creation and assignment
                • 2. Inter-VLAN communication concepts
                  Troubleshooting and Maintenance- Network diagnostics
                  • 1. Log analysis and debugging
                    • 2. Common switching faults
                      - Switch troubleshooting
                      • 1. Connectivity issues diagnosis
                        • 2. Performance monitoring tools
                          Spanning Tree Protocol (STP)- STP operation
                          • 1. Loop prevention mechanisms
                            • 2. Root bridge election
                              - STP variants
                              • 1. Convergence behavior
                                • 2. Rapid STP concepts
                                  Network Infrastructure- Layered network design
                                  • 1. Access, distribution, and core layers
                                    • 2. Scalability considerations
                                      - Redundancy mechanisms
                                      • 1. Link redundancy strategies
                                        • 2. High availability concepts

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