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Cisco 642-991

642-991

Exam Code: 642-991

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

Updated: Jul 23, 2026

Q&A Number: 75 Q&As

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642-991 Online Test Engine

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Cisco 642-991 Exam Syllabus Topics:

SectionObjectives
Virtualization and Compute Integration- UCS integration with fabric
  • 1. Compute networking design
    • 2. Service profiles and policies
      - Server virtualization impacts
      • 1. Network abstraction layers
        • 2. VM mobility considerations
          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
                  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 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
                                  Network Services and Operations- QoS and traffic management
                                  • 1. Data center QoS policies
                                    • 2. Congestion management
                                      - Security in unified fabric
                                      • 1. Segmentation and isolation
                                        • 2. Access control in data center networks

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