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by LinuxBender 483 days ago
What would happen if we didn't use TCP or UDP?

One would have a hard time communicating with anyone. The internet has standardized around TCP and UDP. There are too many devices in most paths that will not be able to handle other protocols. Replacing all the hardware on the internet would take even longer than deprecating IPv4 in my pessimistic opinion. To get around this there would have to be some significant gains of the new protocol that would warrant big expenses in every corporation and government and all the hardware manufacturers would all have to agree on implementing support and further agree on interpretation of the new RFC.
1 comments
mrbluecoat 483 days ago
Agreed. This statement sums up the obvious:

> Granted, the server was just two hops away from the client, and it didn't have to pass through the scary sea of the internet

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immibis 483 days ago
Actually the Internet at large is fine with any protocol on top of IP. It's your home router's NAT function that can only handle UDP and TCP. Set it to bridge mode and use your computer as the router (if you need one) and you can send anything from that computer.

If you have CGNAT you're still screwed. Get one of those free ipv6 tunnels.

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