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  • 920-453 (Ncse callpilot 2.x/3.0 unified messaging)
Exam Code: 920-453
Exam Name: Ncse callpilot 2.x/3.0 unified messaging
Certification Provider: Nortel
Corresponding Certification: NCSE

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920-453

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Last Updated: Aug 21, 2026

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Nortel 920-453 Exam Syllabus Topics:

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

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