Originally Posted by KyadCK
What you want (provided you have not already paid into CAT6) is SFP+, as there is a lot of SFP+ gear for cheap on ebay, as well as QSFP+ (40g) because businesses are upgrading from 10g/40g to 25g/100g.
Good advice! I really like my 40GbE LAN using Ebay hardware.
We need to drop CAT to get > ~5GbE in a practical way, this is why 10GbE is still not really standard, we want to keep CAT and it is not really good enough for 10GbE even today. If I were to get on-board 10GbE I would want it to use SFP+.