What IEEE standard sets the length of the cable segment and the number of devices on an Ethernet bus network?

The IEEE 802.3 standard governs Ethernet networks, specifying the maximum length of cable segments and the number of devices that can be connected. For traditional 10BASE2 (Thin Ethernet), the cable segment length is limited to 185 meters with a maximum of 30 devices. For 10BASE5 (Thick Ethernet), the cable can be up to 500 meters, but the total number of devices is typically similar. Ethernet standards have evolved, with modern implementations like 100BASE-TX and 1000BASE-T using twisted pair cabling and allowing for different configurations.