this post was submitted on 23 Sep 2023
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Two pieces of technology are behind the Internet as we know it today.
Neither one is patented.
They are TCP/IP and Linux.
All the network traffic runs over TCP/IP.
95%+ of the servers run Linux. So do the Android phones and Chromebooks.
Clearly, patent protection in software is not required for society to benefit greatly from technological innovation in software.
TIL UDP Traffic runs on TCP.
"TCP/IP" is conventionally used to indicate the whole protocol suite; including UDP, ICMP and sometimes even ARP.
Technically the parent protocol is IP.
In all my years I have never heard someone suggest that TCP is a catch all term.
I've seen many references to TCP/IP as meaning IP + everything-on-top, usually when talking about other networking technologies like UUnet, OSI, etc. Also as the TCP/IP stack, usually meaning the (Free)BSD networking code used in other systems.
It's not that TCP is a catch-all term, but "TCP/IP" is often used that way.
https://en.wikipedia.org/wiki/Internet_protocol_suite
For that matter, the classic networking text by Douglas Comer is Internetworking with TCP/IP and it does cover UDP, ICMP, ARP, DHCP, DNS, etc.