NCP-AII Exam Dumps | A network architect deploys a Spectrum Ethernet fabric for a RoCE-based AI cluster. During stress testing,

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Question 67/86

A network architect deploys a Spectrum Ethernet fabric for a RoCE-based AI cluster. During stress testing, distributed training performance fluctuates significantly because packet loss occurs whenever multiple training jobs execute simultaneously. Which network feature should be prioritized to improve communication consistency?

A. Lossless Ethernet configuration with congestion management

B. Disabling RDMA on every interface

C. Increasing GPU memory allocation

D. Replacing all Top-of-Rack switches with PCIe switches

Correct Answer: A

RoCE performs best on a properly configured lossless Ethernet network using technologies such as Priority Flow Control (PFC), Explicit Congestion Notification (ECN), and appropriate congestion management. Packet loss causes RDMA retransmissions and reduced performance.
GPU memory size and PCIe switches do not resolve network congestion issues.

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