Thanks for this - I now realise that I had 10BASE-T and 100BASE-T mixed up when I asked the question. P.S. Too many generations... I still remember Token Ring

Thanks for this - I now realise that I had 10BASE-T and 100BASE-T mixed up when I asked the question. P.S. Too many generations... I still remember Token Ring and coax Ethernet fighting it out, and even today I run a mix of four different speeds at home, 1G/2.5G/10G and 25G. Everything's become a bit of a blur. :)