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Updated: Sep 08, 2026

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Nortel 920-453 Exam Overview:

Certification Vendor:Nortel
Exam Name:Nortel MPLS and Carrier Grade Routing Certification Exam
Exam Number:920-453
Exam Duration:90 minutes
Passing Score:70%
Available Languages:English
Certificate Validity Period:Typically does not expire (legacy certification program dependent)
Related Certifications:Nortel Carrier Networking Certifications
Nortel Network Routing Specialist (NNRS)
Exam Format:Multiple choice, Scenario-based questions
Exam Price:USD 125 (varies by testing center/region)
Real Exam Qty:50-65
Sample Questions:Nortel 920-453 Sample Questions
Exam Way:Computer-based testing at authorized testing centers (legacy Nortel certification program)
Pre Condition:Recommended experience with IP networking and routing protocols; familiarity with carrier-grade network concepts
Official Syllabus URL:https://www.nortel.com

Nortel 920-453 Exam Syllabus Topics:

SectionObjectives
Topic 1: VPN Technologies- Security in VPNs
  • 1. Isolation and segmentation techniques
    • 2. VPN scalability considerations
      - MPLS VPN services
      • 1. Layer 2 VPN concepts
        • 2. Layer 3 VPN configuration
          Topic 2: QoS in Carrier Networks- Traffic classification and marking
          • 1. Packet prioritization methods
            • 2. DiffServ model implementation
              - Congestion management
              • 1. Queue management techniques
                • 2. Bandwidth allocation strategies
                  Topic 3: Network Operations and Troubleshooting- Fault resolution
                  • 1. Service restoration procedures
                    • 2. Common MPLS failure scenarios
                      - Monitoring and diagnostics
                      • 1. Performance monitoring techniques
                        • 2. MPLS network troubleshooting tools
                          Topic 4: Routing Protocols in Carrier Networks- Route optimization
                          • 1. Route summarization techniques
                            • 2. Policy-based routing concepts
                              - IGP and EGP integration
                              • 1. BGP route propagation
                                • 2. OSPF and IS-IS in MPLS environments
                                  Topic 5: MPLS Architecture and Fundamentals- MPLS concepts and label switching
                                  • 1. Label distribution protocols (LDP, RSVP-TE)
                                    • 2. MPLS forwarding mechanisms
                                      - MPLS network design
                                      • 1. Core and edge router roles
                                        • 2. Traffic engineering basics

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