Justus sent me an email with an interesting link:

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Since you love to make comparisons to the good ol’ thick yellow cable while I as a mid-30 year old adult have no idea what you are talking about: Computerphile made a video about Ethernet on the occasion of its 50th birthday. The university of Nottingham got the chance to show their museum pieces :-) (about 8:45 min).

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Thanks a million!