Cisco 642-991 : Cisco Data Center Unified Fabric Solutions Design (DCUFD)

  • Exam Code: 642-991
  • Exam Name: Cisco Data Center Unified Fabric Solutions Design (DCUFD)
  • Updated: Oct 23, 2026
  • Q & A: 75 Questions and Answers

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Cisco 642-991 Exam Syllabus Topics:

SectionObjectives
Topic 1: Data Center Unified Fabric Architecture- Unified fabric design principles
  • 1. Layered data center architecture
    • 2. Scalability and redundancy concepts
      - Cisco data center architecture components
      • 1. Cisco UCS integration
        • 2. Cisco Nexus switching platforms
          Topic 2: Switching and Fabric Technologies- Layer 2 and Layer 3 design
          • 1. vPC (virtual Port Channel)
            • 2. STP alternatives and optimization
              - FabricPath and TRILL concepts
              • 1. Scalable Layer 2 fabrics
                • 2. Loop-free multipathing
                  Topic 3: LAN and SAN Convergence- Unified fabric transport
                  • 1. Lossless Ethernet concepts
                    • 2. Data center bridging (DCB)
                      - FCoE and storage networking
                      • 1. Fibre Channel over Ethernet (FCoE)
                        • 2. SAN design considerations
                          Topic 4: 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
                                  Topic 5: 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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