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100BaseT
100BaseT UTP 100m run, 1024 drops, 100Mb/s
Originally used for servers since they were getting too fast for 10BaseX networks and the networks were saturating under load
Also used for “backbones”
Notes:
From Ethernet - The Definitive Guide
All 100Base standards use 4B/5B encoding. The UTP standard sends at 125 Mbaud, three signal levels on copper (multi-level threshold-3 [MLT-3]) at zero to plus/minus 1V differential. The additional symbols available in the 4B/5B with MLT-3 are used to carry additional control signals link "IDLE", "JAM", etc. TIA/EIA Category 5 cable is required to avoid cross-talk and attenuation problems, even within standard lengths.