2026 Cisco High-quality 300-640: Valid Implementing Cisco Data Center AI Infrastructure Test Online

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Cisco 300-640 Exam Syllabus Topics:

SectionObjectives
Data Center Networking for AI Workloads- Cisco Data Center networking technologies
  • 1. Cisco Nexus platform concepts
    • 2. Cisco ACI integration concepts
      - High-performance fabric design
      • 1. Low-latency switching and routing considerations
        • 2. Leaf-spine architecture in AI environments
          Data Center AI Infrastructure Fundamentals- AI/ML workload requirements in data centers
          • 1. Compute, GPU, and acceleration concepts
            • 2. Data pipeline and workload characteristics
              AI Infrastructure Deployment and Operations- Operations and lifecycle management
              • 1. Monitoring and observability
                • 2. Performance tuning and optimization
                  - Deployment models
                  • 1. On-premises AI clusters
                    • 2. Hybrid AI infrastructure integration
                      Security and Governance in AI Data Centers- Infrastructure security
                      • 1. Secure access to AI workloads
                        • 2. Network segmentation and policy enforcement
                          Compute and Storage for AI Infrastructure- Storage systems
                          • 1. High-throughput storage for AI training data
                            • 2. Distributed storage concepts
                              - Compute architecture
                              • 1. GPU-based compute nodes
                                • 2. HPC-style scaling considerations

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                                  Cisco Implementing Cisco Data Center AI Infrastructure Sample Questions (Q26-Q31):

                                  NEW QUESTION # 26
                                  A network engineer analyzes RoCEv2 traffic flows in an AI training cluster and notices that all RoCEv2 packets have the Don't Fragment bit set in the IP header. Why must RoCEv2 set the DF bit in all packets?

                                  Answer: D

                                  Explanation:
                                  RoCEv2 carries InfiniBand transport semantics over UDP/IP, and IP fragmentation would disrupt the expected packet sequencing and ordering behavior required by RDMA. Setting the Don't Fragment bit prevents intermediate devices from fragmenting RoCEv2 packets, preserving reliable RDMA transport behavior across the AI training fabric.


                                  NEW QUESTION # 27
                                  To support growing AI workload requirements, a regional medical practice is adding new X9516 X-Fabric module, UCS PCI Mezz cards, and UCS X580p PCIe nodes to their existing X-Series chassis. Which two administrative actions must be taken before the X-Fabric module is added to the chassis? (Choose two.)

                                  Answer: A,B

                                  Explanation:
                                  Before adding the X9516 X-Fabric module, the affected X-Series blades must be powered down because the X-Fabric connectivity path requires hardware installation and cannot be safely introduced while the connected compute nodes are running. The UCS PCI Mezzanine cards must also be installed in the blades so they can physically connect through the X-Fabric module to the X580p PCIe nodes for GPU expansion.


                                  NEW QUESTION # 28
                                  A Cisco Nexus switch participates in an AI cluster using ECMP forwarding. Several flows between GPU servers consistently use the same uplink, creating congestion while other links remain underutilized. Which action improves traffic distribution?

                                  Answer: C

                                  Explanation:
                                  ECMP relies on hashing algorithms to distribute traffic across equal-cost paths. In AI environments, large elephant flows may hash to the same uplink, causing imbalance. Adjusting the hashing method improves entropy and distributes flows more evenly. Increasing MTU improves efficiency but does not rebalance traffic. Port security and disabling hashing are unrelated to load distribution.


                                  NEW QUESTION # 29
                                  A data center facility experienced a power outage, and the UCS X-Series servers did not restart automatically when power is restored. The configuration must be updated to prioritize these servers to boot as soon as possible to resume their work. Which set of power policy configurations must be used to meet these requirements?

                                  Answer: A

                                  Explanation:
                                  The servers must be configured to power back on automatically after power is restored, so the restore behavior should be set to always power on. Setting the power priority to high ensures these UCS X-Series servers receive priority during power recovery, allowing them to resume workloads as quickly as possible.


                                  NEW QUESTION # 30
                                  Which type of Cisco Intersight profile, when deployed to fabric interconnects, includes the configuration settings for ports, VLANs, and VSANs?

                                  Answer: C

                                  Explanation:
                                  A UCS Domain profile is deployed to fabric interconnects in Cisco Intersight Managed Mode and contains the domain-level configuration, including port policies, VLANs, VSANs, network connectivity, and other fabric interconnect settings.


                                  NEW QUESTION # 31
                                  ......

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