Nortel 920-245 Exam Information and Actual Questions

  • Exam Code/Number: 920-245
  • Exam Name/Title: Ethernet Switching
  • Certification Provider: Nortel
  • Corresponding Certification: NCSS
  • Exam Questions: 64
  • Updated On: Oct 13, 2026

920-245
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Nortel
920-245 Exam
Ethernet Switching

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Nortel 920-245 Exam Overview:

Certification Vendor:Nortel
Exam Name:Ethernet Switching
Exam Number:920-245
Related Certifications:Nortel NCSS
Real Exam Qty:60–70 (varies by source)
Available Languages:English
Exam Format:Multiple Choice
Sample Questions:Nortel 920-245 Sample Questions
Exam Way:Computer-based exam (typically proctored via testing centers or authorized providers depending on region and era)
Pre Condition:No strict prerequisites documented; basic networking knowledge recommended.

Nortel 920-245 Exam Syllabus Topics:

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


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