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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 29, 2026

Q & A: 75 Questions and Answers

642-991 Free Demo download

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Cisco 642-991 Exam Syllabus Topics:

SectionObjectives
Network Services and Operations- Security in unified fabric
  • 1. Segmentation and isolation
    • 2. Access control in data center networks
      - QoS and traffic management
      • 1. Data center QoS policies
        • 2. Congestion management
          Data Center Unified Fabric Architecture- Cisco data center architecture components
          • 1. Cisco UCS integration
            • 2. Cisco Nexus switching platforms
              - Unified fabric design principles
              • 1. Layered data center architecture
                • 2. Scalability and redundancy concepts
                  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
                          Switching and Fabric Technologies- FabricPath and TRILL concepts
                          • 1. Scalable Layer 2 fabrics
                            • 2. Loop-free multipathing
                              - Layer 2 and Layer 3 design
                              • 1. STP alternatives and optimization
                                • 2. vPC (virtual Port Channel)
                                  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

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