Ethernet is a cable based data network technology for local data networks (LANs). It enables data exchange in the form of data frameworks between all attached devices in a local area network (LAN) (computers, printers and similar).
Ethernet covers definitions for cable types and plugs, describes signaling for the bit transmission layer and specifies package formats and protocols. Ethernet is standardized in the IEEE - standard 802.3.
Ethernet can be the basis for lan protocols e.g. IPX/SPX, TCP/IP, Ethercat or Profinet.