Which wiring standard is used on modern Ethernet connectors and jacks?

Modern Ethernet connectors and jacks primarily use the TIA/EIA-568 wiring standards, specifically T568A and T568B. Both standards define the pinouts for the eight wires within the Ethernet cables, ensuring proper data transmission. T568A is often preferred for new installations, while T568B is commonly used in existing networks. These standards support various Ethernet speeds, including 10/100/1000 Mbps and beyond.