Cisco 300-640 : Implementing Cisco Data Center AI Infrastructure

  • Exam Code: 300-640
  • Exam Name: Implementing Cisco Data Center AI Infrastructure
  • Updated: Sep 10, 2026
  • Q & A: 82 Questions and Answers

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Cisco 300-640 Exam Syllabus Topics:

SectionObjectives
Topic 1: Security and Governance in AI Data Centers- Infrastructure security
  • 1. Network segmentation and policy enforcement
    • 2. Secure access to AI workloads
      Topic 2: Compute and Storage for AI Infrastructure- Storage systems
      • 1. High-throughput storage for AI training data
        • 2. Distributed storage concepts
          - Compute architecture
          • 1. HPC-style scaling considerations
            • 2. GPU-based compute nodes
              Topic 3: AI Infrastructure Deployment and Operations- Operations and lifecycle management
              • 1. Monitoring and observability
                • 2. Performance tuning and optimization
                  - Deployment models
                  • 1. Hybrid AI infrastructure integration
                    • 2. On-premises AI clusters
                      Topic 4: Data Center AI Infrastructure Fundamentals- AI/ML workload requirements in data centers
                      • 1. Compute, GPU, and acceleration concepts
                        • 2. Data pipeline and workload characteristics
                          Topic 5: Data Center Networking for AI Workloads- High-performance fabric design
                          • 1. Low-latency switching and routing considerations
                            • 2. Leaf-spine architecture in AI environments
                              - Cisco Data Center networking technologies
                              • 1. Cisco ACI integration concepts
                                • 2. Cisco Nexus platform concepts

                                  Cisco Implementing Cisco Data Center AI Infrastructure Sample Questions:

                                  Question #1

                                  A company implements multicast traffic optimization for distributed AI training nodes. Which protocol enables efficient multicast receiver discovery in IPv4 networks?

                                  • A. CDP
                                  • B. ARP
                                  • C. LLDP
                                  • D. IGMP
                                  Answer: D

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                                  Question #2

                                  An organization deploys a new AI training fabric that uses RoCEv2 for GPU communication. The network architect designs the QoS configuration to ensure reliable RDMA transport and must meet these requirements:
                                  - Support 256 GPU servers with RDMA connectivity.
                                  - Prevent any packet loss that causes RDMA connection failures.
                                  - Maintain consistent low-latency communication with a target of less
                                  than 10 microseconds.
                                  - Use industry-standard protocols and configurations.
                                  Which configuration ensures that RoCEv2 operates as a lossless transport?

                                  • A. Configure weighted fair queuing to prioritize RDMA traffic over other traffic classes.
                                  • B. Enable Priority Flow Control on the traffic class carrying RoCEv2 packets.
                                  • C. Implement traffic shaping to smooth RDMA traffic bursts and prevent congestion.
                                  • D. Set the RDMA traffic to use the highest DSCP value to ensure priority forwarding.
                                  Answer: B

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                                  Question #3

                                  What is a function of NVLink technology within a high-performance AI server or cluster?

                                  • A. to provide a high-speed, low-latency direct interconnect for GPU-to-GPU communication
                                  • B. to enable remote access and virtualization of GPU resources for distributed AI development teams
                                  • C. to manage power distribution and thermal regulation across all installed GPU units
                                  • D. to establish a secure, encrypted channel for data transfer between the AI server and external storage
                                  Answer: A

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                                  Question #4

                                  A network team is configuring quality of service (QoS) for RoCEv2 traffic on a VXLAN fabric. The team must ensure that congestion notification packets (CNP) generated by storage targets are never dropped in the network, as these packets are critical for congestion control feedback. How must CNP packets be handled in the QoS configuration to ensure reliable delivery?

                                  • A. Classify CNP packets to a high-priority queue using their DSCP marking.
                                  • B. Apply traffic shaping to CNP packets to prevent them from causing additional congestion.
                                  • C. Enable Priority Flow Control specifically for CNP packets on a dedicated CoS value.
                                  • D. Configure CNP packets to use the same queue as regular RoCEv2 data traffic.
                                  Answer: A

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                                  Question #5

                                  A network engineer is deploying an AI training fabric using Cisco Nexus switches with RoCEv2 enabled. During testing, packet drops occur when traffic bursts exceed buffer capacity. Which feature should be configured to minimize congestion and improve lossless Ethernet performance for GPU traffic?

                                  • A. Priority Flow Control
                                  • B. DHCP Snooping
                                  • C. BPDU Guard
                                  • D. Storm Control
                                  Answer: A

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