Ethernet is a family of computer networking technologies for local area networks (LANs).It’s considered the most commonly used LAN today

It was originally developed by Xerox in the 1970s. initially designed to have coaxial cables, but a typical Ethernet LAN now uses special twisted pair cables, or fiber optical cabling.

Ethernet was commercially introduced in 1980 and standardized in 1985 as IEEE 802.3. Ethernet has largely replaced competing wired LAN technologies. The comprise several wiring and signaling variants of the OSI physical layer in use with Ethernet. The original 10BASE5 Ethernet used coaxial cable as a shared medium. Ethernet standards are constantly evolving  to embrace new media, higher transmission speeds and changes in frame content and functional requirements.