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

642-991 real exams

Exam Code: 642-991

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

Updated: Sep 17, 2026

Q & A: 75 Questions and Answers

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Cisco 642-991 Exam Syllabus Topics:

SectionObjectives
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 Nexus switching platforms
        • 2. Cisco UCS integration
          Switching and Fabric Technologies- FabricPath and TRILL concepts
          • 1. Scalable Layer 2 fabrics
            • 2. Loop-free multipathing
              - Layer 2 and Layer 3 design
              • 1. vPC (virtual Port Channel)
                • 2. STP alternatives and optimization
                  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
                          Network Services and Operations- QoS and traffic management
                          • 1. Congestion management
                            • 2. Data center QoS policies
                              - Security in unified fabric
                              • 1. Segmentation and isolation
                                • 2. Access control in data center networks
                                  Virtualization and Compute Integration- Server virtualization impacts
                                  • 1. Network abstraction layers
                                    • 2. VM mobility considerations
                                      - UCS integration with fabric
                                      • 1. Compute networking design
                                        • 2. Service profiles and policies

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