Ethernet is a family of wired networking technologies, standardised as IEEE 802.3, used to connect devices in local area networks (LANs) and data centres via twisted-pair, fibre, and coaxial cabling at speeds from 10 Mbit/s to 400 Gbit/s.
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- Ethernet defines the physical and data link layer methods for framing and transmitting data over twisted pair and fibre cabling. It has evolved from early 10 Mbit/s versions to 100 Gbit/s and higher rates while keeping a common frame format.
- It is the dominant wired local area network technology in offices, data centres, and industrial settings, and variants such as Time-Sensitive Networking add deterministic timing for control applications.