Quiz Cisco - 300-640 - Efficient Certification Implementing Cisco Data Center AI Infrastructure Sample Questions

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Cisco 300-640 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: AI Infrastructure Operations	20%	- Performance Optimization - Troubleshooting Common Issues - Monitoring and Management Tools - Capacity Planning
Topic 2: AI Infrastructure Fundamentals	15%	- AI Infrastructure Requirements - AI Ecosystem Components - AI Workload Characteristics - GPU Architecture and Types
Topic 3: AI Infrastructure Security and Compliance	10%	- Compliance Considerations - Security Best Practices - Access Control and Authentication
Topic 4: AI Infrastructure Deployment	25%	- Storage Configuration for AI - Network Switch Configuration - Hardware Installation and Configuration - GPU Server Configuration - Cabling and Connectivity
Topic 5: Cisco AI Infrastructure Architecture	30%	- Storage Architecture Considerations - Cisco UCS AI Infrastructure Solutions - Network Architecture for AI Workloads - Hyperconverged Infrastructure for AI

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Cisco Implementing Cisco Data Center AI Infrastructure Sample Questions (Q77-Q82):

NEW QUESTION # 77
A data center team enables jumbo frames in a Cisco AI cluster. What is the primary benefit of increasing the MTU for east-west GPU traffic?

A. Increased encryption overhead
B. Reduced Layer 3 convergence time
C. Elimination of packet buffering
D. Lower CPU utilization and fewer frames

Answer: D

Explanation:
Jumbo frames reduce the number of packets needed to transmit large AI datasets, decreasing CPU interrupts and protocol overhead. This improves throughput and efficiency for GPU communication. Larger MTUs do not directly affect convergence or eliminate buffering, and they typically reduce rather than increase processing overhead.

NEW QUESTION # 78
When considering a rail-only network design, when would adding spine switches make sense?

A. when scaling out to support traffic between multiple scalable units
B. when increasing the overall available buffers that spines provide
C. when needing a greater path redundancy within a single scalable unit
D. when providing greater overall total bandwidth within a single scalable unit

Answer: A

Explanation:
In a rail-only design, each scalable unit provides optimized east-west GPU communication within that unit. Spine switches are added when the design must scale beyond a single scalable unit and support traffic between multiple scalable units while preserving predictable performance for larger AI training environments.

NEW QUESTION # 79
A customer uses Cisco AI Products within Intersight and observes packet drops for RoCEv2 traffic. Which System QoS policy configuration must be deployed to ensure that RoCEv2 traffic is classified as lossless?

A. Disable Gold system class.
B. Enable Platinum class and uncheck Allow Packet Drops.
C. Enable all QoS system classes.
D. Disable Platinum system class.

Answer: B

Explanation:
RoCEv2 traffic must be mapped to a lossless system class. Enabling the Platinum class and clearing Allow Packet Drops configures that class as lossless, preventing packet drops for RoCEv2 traffic and supporting reliable RDMA communication for AI workloads.

NEW QUESTION # 80
An engineer must configure dynamic load balancing (DLB) on a Cisco Nexus 9000 Series Switch AI fabric using a CLI. Which configuration must be implemented for only the odd-numbered interfaces?

A. Exclude the desired interfaces from DLB with the interface level configuration of no dlb-interface.
B. Create a QoS policy that enables DLB and apply that policy to the relevant interfaces.
C. Create a DLB hardware profile and include the list of desired interfaces.
D. Under the relevant interface-level configuration, add the keyword dlb-interface.

Answer: D

Explanation:
Dynamic load balancing is enabled on the selected Cisco Nexus 9000 interfaces by applying the interface-level dlb-interface command. For this deployment requirement, the command is applied only to the odd-numbered interfaces that participate in the DLB configuration.

NEW QUESTION # 81
An engineer deploys an AI fabric on Cisco Nexus 9000 Series Switches connected to Cisco UCS nodes with NVIDIA GPUs. The requirements call for optimal network performance for training workloads. Adaptive routing is enabled on the NICs, and per-packet load balancing is enabled on the switches. Which other configuration must be implemented for this integration to be fully operational?

A. Include matching statements in your QoS policy so the switch knows which incoming packets to load balance.
B. Add the "adaptive-routing" keyword under the switch load balancing configuration.
C. Include switch configuration "hardware profile spectrum-x" in global configuration mode.
D. Set the cisco_dlb=1 option in the NIC configuration so the NIC knows it can use adaptive routing.

Answer: D

Explanation:
The NIC must be explicitly configured with the Cisco dynamic load-balancing setting so it recognizes that the connected Cisco Nexus fabric supports adaptive routing. This completes the integration between NIC-side adaptive routing and switch-side per-packet load balancing for optimized AI training traffic.

NEW QUESTION # 82
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