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Cisco 642-991

642-991

Exam Code: 642-991

Exam Name: Cisco Data Center Unified Fabric Solutions Design (DCUFD)

Updated: Aug 31, 2026

Q & A: 75 Questions and Answers

642-991 Free Demo download

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Cisco 642-991 Exam Syllabus Topics:

SectionObjectives
Topic 1: LAN and SAN Convergence- Unified fabric transport
  • 1. Data center bridging (DCB)
    • 2. Lossless Ethernet concepts
      - FCoE and storage networking
      • 1. Fibre Channel over Ethernet (FCoE)
        • 2. SAN design considerations
          Topic 2: Network Services and Operations- Security in unified fabric
          • 1. Access control in data center networks
            • 2. Segmentation and isolation
              - QoS and traffic management
              • 1. Data center QoS policies
                • 2. Congestion management
                  Topic 3: Virtualization and Compute Integration- Server virtualization impacts
                  • 1. Network abstraction layers
                    • 2. VM mobility considerations
                      - UCS integration with fabric
                      • 1. Service profiles and policies
                        • 2. Compute networking design
                          Topic 4: Data Center Unified Fabric Architecture- Unified fabric design principles
                          • 1. Scalability and redundancy concepts
                            • 2. Layered data center architecture
                              - Cisco data center architecture components
                              • 1. Cisco UCS integration
                                • 2. Cisco Nexus switching platforms
                                  Topic 5: Switching and Fabric Technologies- Layer 2 and Layer 3 design
                                  • 1. STP alternatives and optimization
                                    • 2. vPC (virtual Port Channel)
                                      - FabricPath and TRILL concepts
                                      • 1. Scalable Layer 2 fabrics
                                        • 2. Loop-free multipathing

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