10BASE5, commonly known as thicknet, is the original full-specification Ethernet standard, using RG-8 coaxial cable. The cable is thick (0.405 inches), stiff, and rated at 50 ohms, with a solid copper core, heavy shielding, and a durable outer jacket—often yellow, earning it the nickname “yellow cable” or “frozen garden hose.” The name reflects its 10 Mbit/s speed, baseband signaling, and 500-meter maximum segment length. Devices connect via vampire taps, allowing live installation, with up to 100 nodes per segment spaced at 2.5-meter intervals, using AUI 15-pin connectors.