Ethernet is a family of wired computer networking technologies commonly used in local area networks (LAN), metropolitan area networks (MAN) and wide area networks (WAN).

Source: https://en.wikipedia.org/wiki/Ethernet

Invented in 1973 by Xerox. Based on the bus topology . Xerox worked with Digital Equipment Corp. (DEC) and Intel to publish the then Digital/Intel/Xerox (DIX) standard. In 1979 they transferred control of the Ethernet standard to the IEEE .