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Re:Why 50 Ohms? by whoopdedo on Sunday November 17, 2019 @06:53PM (#21560880)
The convenience of existing cables and connectors seems to be the motivation.

> The first Ethernet used 9.5-mm coaxial cable, also called ThickNet, or as we used to curse it as we tried to lay out the cables, Frozen Yellow Snake.

> To attach a device to this 10Base5 physical media, you had to drill a small hole in the cable itself to place a "vampire tap."

> So-called Thinnet (10Base2) uses cable TV-style cable, RG-58A/U. This made it much easier to lay out network cable.

https://www.hpe.com/us/en/insights/articles/the-birth-and-ri...

Re:Why 50 Ohms? by jacquesm on Sunday November 17, 2019 @08:45PM (#21561303)
The neat thing about vampire taps is that you don't need to disconnect the cable so it could be done on a running bus topology network without interruption. If you did it right...
Re:Why 50 Ohms? by tyingq on Sunday November 17, 2019 @07:06PM (#21560949)
" So-called Thinnet (10Base2) uses cable TV-style cable, RG-58A/U. This made it much easier to lay out network cable."

That's not quite right. Cable TV type cable is 75 ohm RG59. I guess maybe they just mean both were coaxial and relatively flexible.

Re:Why 50 Ohms? by godbyk on Saturday November 23, 2019 @12:45AM (#21612688)
Well, they didn't say 'cable TV cable'. They said 'cable TV-style cable'.