Architecture · 1983–now · Foundations
TCP/IP
The network stack that won. Every "revolutionary" protocol still rides these packets.
Why TCP/IP stuck
TCP/IP won by being good enough, debuggable, and incrementally deployable — not by committee perfection. Alternatives arrived with better slides and worse adoption paths. The internet is the proof that boring protocols outlive elegant ones.

Compare with
Related
Platform · 1991–now
HTTP / HTTPS
The application protocol of the internet. HTTP/2 and HTTP/3 are evolutions, not replacements.
Platform · 1971–now
Unix / POSIX
Process model, pipes, and files-as-interfaces. Linux and macOS still speak this dialect every day.
Architecture · 2015–now
gRPC
Binary RPC with contracts. Fast internal glue that should never face the public internet without a gateway.