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I'm a network engineer for a Swiss ISP that serves only a specific niche of institutional customers, not home users.
I think there are still many who don't know this: All important internet links go over fiber optic cables with lasers and photo diodes at the ends, and in the backbone everything under 100 Gigabits per second is slow.
The speeds you are used to as a consumer are mostly limited by the last mile to your house, be it wireless, DSL on telephone wires, or DOCSIS on coax cable. Everywhere else 10 Gigabits per second is like the minimum. Our current generation backbone routers can't even do 1 Gigabits per second interfaces anymore.
I'd love to understand/explore the networking of telecoms..
Those big deployments always seem a bit magical vs my weird home-lab/stack and what our SMB-MSP outputs.