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Re:Transceivers: The Device Between the NIC and the Network by azazel75 on Friday September 13, 2019 @11:16AM (#20962871)
"Before Ethernet was common, BNC coaxial cables were used on some NICs as well"

Yes, at that time Ethernet was coaxial as well, the 10Base2

Re:Transceivers: The Device Between the NIC and the Network by ngvrnd on Friday September 13, 2019 @12:21PM (#20963491)
For fun, look up "vampire taps" https://en.wikipedia.org/wiki/Vampire_tap