Early Ethernet with Coaxial Cabling
The earliest Ethernet networks, back in the 1970s and into the 1980s, used a long coaxial cable that ran near each device on the LAN. This early technology, which came to be called 10BASE-5, used a thick coaxial cable that ran through the space in which the LAN was needed. Then, each device used a short cable to tap into the LAN cable (called a LAN segment), attaching to 10BASE-5 NIC to the end of the cable. The end result was a LAN, with a single electrical circuit connected to all the NICs connected to the LAN. Figure 6-2 shows the general idea.
Figure 6-2 10BASE-5 Conceptual Drawing (Thicknet)
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