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New hollow-core fiber test pushes internet speeds to 1.2Tb/s
(interestingengineering.com)
This is a most excellent place for technology news and articles.
You'll never get this kind of result in the real world though because no matter how good the fibre optic is it's inevitably going to travel through a router with a chip made by the lowest bidder.
Not sure why you think so, nowadays network switches handle several terabits already, and on the consumer side there's always premium routers