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Nortel 920-124

920-124

Exam Code: 920-124

Exam Name: NNCDS -Ethernet Switching Exam

Updated: Sep 10, 2026

Q&A Number: 69 Q&As

920-124 Free Demo download:

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About Nortel 920-124 Exam dumps / Bootcamp

From a free demo to 365 days of free updates and a conditional money-back guarantee, Dumpkiller covers every stage of your Nortel NNCDS -Ethernet Switching preparation. Start with the 69 920-124 practice questions today and make 2026 the year you get certified.

Nortel 920-124 Exam Overview:

Certification Vendor:Nortel
Exam Name:Nortel Network Switching Specialist (NSS) / Enterprise Switching Fundamentals Exam
Exam Number:920-124
Available Languages:English
Real Exam Qty:50-65
Related Certifications:Nortel Network Professional (NNP)
Nortel Network Switching Specialist (NSS)
Exam Duration:90 minutes
Certificate Validity Period:Typically does not expire (legacy Nortel certification program dependent)
Exam Price:USD 100-150 (varies by testing center and region)
Exam Format:Multiple choice, Scenario-based questions
Passing Score:70%
Sample Questions: DOWNLOAD DEMO
Exam Way:Computer-based testing at authorized testing centers (legacy Nortel certification program)
Pre Condition:Recommended understanding of basic networking concepts, TCP/IP, and LAN switching fundamentals
Official Syllabus URL:https://www.nortel.com

Nortel 920-124 Exam Syllabus Topics:

SectionObjectives
Topic 1: Spanning Tree Protocol (STP)- STP operation
  • 1. Root bridge election
    • 2. Loop prevention mechanisms
      - STP variants
      • 1. Rapid STP concepts
        • 2. Convergence behavior
          Topic 2: VLANs and Trunking- Trunking protocols
          • 1. 802.1Q tagging
            • 2. Trunk link configuration principles
              - VLAN configuration
              • 1. Inter-VLAN communication concepts
                • 2. VLAN creation and assignment
                  Topic 3: Network Infrastructure- Layered network design
                  • 1. Access, distribution, and core layers
                    • 2. Scalability considerations
                      - Redundancy mechanisms
                      • 1. High availability concepts
                        • 2. Link redundancy strategies
                          Topic 4: LAN Switching Fundamentals- Switch operation principles
                          • 1. MAC address learning and forwarding
                            • 2. Switching tables and forwarding logic
                              - LAN segmentation
                              • 1. Collision domains and broadcast domains
                                • 2. VLAN concepts and usage
                                  Topic 5: Troubleshooting and Maintenance- Network diagnostics
                                  • 1. Common switching faults
                                    • 2. Log analysis and debugging
                                      - Switch troubleshooting
                                      • 1. Connectivity issues diagnosis
                                        • 2. Performance monitoring tools

                                          Your 920-124 Exam Questions, Answered

                                          What is the 920-124 exam all about?

                                          The Nortel NNCDS -Ethernet Switching exam (code: 920-124) is the official Nortel exam that leads to the NCDS certification. It sits at the Professional level of the Nortel certification track. It is also connected with related credentials such as Nortel Network Switching Specialist (NSS), Nortel Network Professional (NNP). Passing it proves to employers that your skills have been validated by Nortel itself, which is why the 920-124 credential keeps showing up in job postings.

                                          How many questions are in the 920-124 exam, and how long does it take?

                                          The Nortel NNCDS -Ethernet Switching exam gives you 90 minutes to work through 50-65. Pacing matters more than most candidates expect, so before exam day, run at least one full timed session in the Dumpkiller test engine to learn how long you can afford per question. If an item stalls you, flag it and move on — coming back later beats burning five minutes on a single question.

                                          What score do I need to pass the 920-124 exam, and how much does it cost?

                                          The passing score for the Nortel NNCDS -Ethernet Switching exam is 70%, and the official registration fee is USD 100-150 (varies by testing center and region). Remember that a failed attempt means paying that fee in full again, so a timed self-assessment with Dumpkiller practice questions about a week before your exam date is a cheap way to confirm you are scoring comfortably above 70%.

                                          Are there any prerequisites for the 920-124 exam?

                                          According to Nortel, the following applies: Recommended understanding of basic networking concepts, TCP/IP, and LAN switching fundamentals. Certification policies do change from time to time, so confirm the latest requirements on the official exam page at https://www.nortel.com before you register.

                                          Can I try the 920-124 practice questions before buying?

                                          Yes. Dumpkiller offers a free 920-124 PDF demo so you can review the question style, difficulty, and explanations before committing to anything. After purchase, your Nortel NNCDS -Ethernet Switching material includes 365 days of free updates, and if your product expires after that, you can extend the update service at a 50% discount from your member zone.

                                          What happens if I do not pass the 920-124 exam, and how is my order delivered?

                                          If you take the corresponding 920-124 exam within 60 days of your purchase and do not pass, you can apply for a full refund under our 100% Money Back Guarantee, subject to a few conditions: the failed exam must be the one matching your purchase; sitting the exam within 3 days of purchase does not qualify, since that leaves too little preparation time; downloading the material without actually taking the exam does not qualify; free materials and expired orders are excluded; and the candidate name must match the payer name. To apply, send a scanned copy of your enrollment slip together with your official Score Report (PDF) within 2 days after the exam, and claims are processed within 7 days. If you would rather not take a refund, you can exchange your purchase for two free products of equal value while keeping the update service on the product you originally bought. As for delivery, everything is an instant download: your products are sent to your email within one minute of payment — contact customer service if nothing arrives within 2 hours — and there is no limit on the number of computers you can install the software on.

                                          What topics are covered in the 920-124 exam?

                                          The official Nortel NNCDS -Ethernet Switching syllabus is organized into 5 main domains. The first three are LAN Switching Fundamentals, Troubleshooting and Maintenance, and Network Infrastructure. For the full domain-by-domain breakdown, see the complete Exam Topics outline above.

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