News — Networking Fundamentals
Layer 1 Decoded: Every Physical Form Factor in a Modern Rack
A field guide to the physical layer in 2026 — SFP through OSFP-XD, plus the PCIe-domain connectors (OCuLink, SlimSAS, MCIO, CopprLink) and the proprietary shells on top of both. Lane counts, speeds, modulation, and what actually plugs into what.