IEEE 802.3df, which standardizes 1.6 terabit-per-second (1,600 Gbit/s) Ethernet using 200-Gbit/s-per-lane signaling, was approved by the IEEE Standards Association in early 2025, becoming the fastest standardized rate in the Ethernet family, aimed primarily at hyperscale data-center interconnects and AI-cluster networking rather than end-user connections. It builds on the same 200G-per-lane electrical and optical building blocks used in the 800 Gbit/s Ethernet standard ratified a few years earlier.
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IEEE 802.3df, which standardizes 1.6 terabit-per-second (1,600 Gbit/s) Ethernet using 200-Gbit/s-per-lane signaling, was approved by the IEEE Standards Association in early 2025, becoming the fastest standardized rate in the Ethernet family, aimed primarily at hyperscale data-center interconnects and AI-cluster networking rather than end-user connections. It builds on the same 200G-per-lane electrical and optical building blocks used in the 800 Gbit/s Ethernet standard ratified a few years earlier.
The highest single-link data rate specified by the IEEE 802.3df amendment, defining 1.6 terabit-per-second Ethernet built from multiple 200 Gbit/s-per-lane electrical and optical signals.
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Permanent ID limitsregistry.com/limits/LR-ETHERNET-1600G-STANDARD
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Limits Registry. LR-ETHERNET-1600G-STANDARD. Highest speed standardized in the IEEE Ethernet family. 2026.