Cisco Implementing Cisco Data Center AI Infrastructure : 300-640

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Cisco 300-640 Exam Syllabus Topics:

Cisco Implementing Cisco Data Center AI Infrastructure Sample Questions:

1. 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?

A) Increase MTU size
B) Enable port security
C) Disable hashing
D) Modify the hashing algorithm

2. A Cisco AI environment requires synchronized packet processing timestamps across network devices for analytics accuracy. Which protocol should be deployed?

A) DNS
B) PTP
C) NTP
D) FTP

3. An engineer must optimize the performance of an AI inference workload running on a Cisco UCS C-Series rack server. The workload experiences intermittent latency spikes, and Intersight system logs show frequent thermal event entries. Which troubleshooting action must be taken first to address the performance issues on the Cisco UCS server?

A) Examine the storage configuration, including the RAID configuration and disk health, to ensure that the storage subsystem is not causing latency issues.
B) Review the resource utilization of the AI workload (CPU, memory, and GPU) to identify potential bottlenecks and optimize resource allocation.
C) Inspect the physical environment of the server, including ambient temperature and airflow, and replace any failed fans.
D) Check the power supply status and power consumption of the UCS server using UCS Manager to ensure that the server has sufficient power.

4. Refer to the exhibit. Users report delayed response times and network latency when running certain AI workloads on a specific Cisco UCS Intersight Managed Mode Domain. Based on the fault message and reported symptoms, which troubleshooting action must be taken first to address the network latency issues?

A) Review the pause frame counters for signs of congestion on Fabric Interconnect B Port 11.
B) Check the physical cabling and SFP+ transceivers on port 11 of switch B for potential hardware failures or incorrect configurations.
C) Examine the UCS fabric interconnect configuration for port-channel 11 on Fabric Interconnect B.
D) Review the AI workload configuration to optimize resource allocation (CPU, memory, GPU) for the affected applications.

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

Solutions: