InfiniBand (C) is the most suitable networking technology for scalable, low-latency data transfer in multi- node GPU training. It offers high throughput (up to 400 Gbps) and ultra-low latency (<1 µs), ideal for synchronizing gradients and weights across nodes using NVIDIA NCCL. InfiniBand's RDMA (Remote Direct Memory Access) further enhances efficiency by bypassing CPU overhead, critical for distributed deep learning.
* Wi-Fi 6(A) lacks the reliability and bandwidth (max ~10 Gbps) for training clusters.
* Fiber Channel(B) is for storage, not compute node interconnects.
* Ethernet (1 Gbps)(D) is too slow for large-scale AI training demands.
NVIDIA's DGX systems use InfiniBand for this purpose (C).