920-245 exam dumps

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  • Exam Code: 920-245
  • Exam Name: Ethernet Switching
  • No. of Questions: 64 Questions and Answers
  • Updated: Aug 09, 2026

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Nortel 920-245 Exam Syllabus Topics:

SectionObjectives
Topic 1: Ethernet Switching Fundamentals- Ethernet standards and frame structure
  • 1. Ethernet frame fields and encapsulation
    • 2. MAC addressing and switching behavior
      Topic 2: Spanning Tree Protocol (STP)- Loop prevention mechanisms
      • 1. Root bridge election
        • 2. STP roles and states
          Topic 3: Switching Operations- Learning and forwarding tables
          • 1. MAC address table management
            • 2. Unknown unicast flooding
              - Switching mechanisms
              • 1. Store-and-forward switching
                • 2. Cut-through switching
                  Topic 4: VLANs and Trunking- VLAN concepts
                  • 1. 802.1Q tagging
                    • 2. Access vs trunk ports
                      Topic 5: Network Troubleshooting- Layer 1 and Layer 2 diagnostics
                      • 1. Link failures and duplex mismatches
                        • 2. Switch port troubleshooting tools

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