The fabric between your GPU nodes. Ask for switches, adapters, optics and cabling by speed and port count, or describe the cluster and vendors quote a full bill of materials.
These are sourced on request — there are no fixed listings in this category yet. Send what you need and verified vendors quote you directly.
Describe the networking you need — part numbers, quantities and the platform it's for — and matching vendors quote you directly.
Yes. Give the node count, GPUs per node and target bandwidth and vendors quote switches, NICs, optics and cables together.
Both are available. Say which you prefer, or describe the workload and vendors will propose options.
Yes — list the speed, length and connector type.