Ethernet
Ethernet is the most common type of LAN. It was originally developed in the 1970s by
Digital Equipment Corporation (DEC), Intel, and Xerox and was called DIX Ethernet. It
later came to be called thick Ethernet (because of the thickness of the cable used in this type
of network), and it transmitted data at 10 megabits per second (Mbps). The standard for
Ethernet was updated in the 1980s to add more capability, and the new version of Ethernet
was referred to as Ethernet Version 2 (also called Ethernet II).
The Institute of Electrical and Electronic Engineers (IEEE) is a professional organization
that de?¬?nes network standards. IEEE standards are the predominant LAN standards in the
world today. In the mid-1980s, an IEEE workgroup de?¬?ned new standards for Ethernet-like
networks. The set of standards they created was called Ethernet 802.3 and was based on the
carrier sense multiple access with collision detection (CSMA/CD) process. Ethernet 802.3
speci?¬?ed the physical layer (Layer 1) and the MAC portion of the data link layer (Layer 2).
Today, this set of standards is most often referred to as simply ???Ethernet.???
Ethernet LAN Standards
Ethernet LAN standards specify cabling and signaling at both the physical and data link
layers of the OSI reference model.
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