Earlier quoted context omitted.
ought to be enough for anybody ... :-p I was surprised to find out there is a TCP/IP stack for DOS, I remember still having to depend on non-MS software as late as Win 3.1 to connect to the internet [1], never heard of "LAN manager" [2] but apparently it did have (some?) support. Btw, according to its author, "mTCP is a hobby project that I started in 2005." [3] -- 1: https://en.wikipedia.org/wiki/Trumpet_Winsock 2:…
You could get all kinds of network stacks for msdos. Net ware, 3Com XNS, a weird proto Microsoft network I can’t recall the name of, banyan vines, decnet . Weird stuff for ibm token ring networks. And yep TCP as well. When lan manager was released you could run it over a choice of networks TCP included, because the original lan manager ran on Unix as well as OS/2 as the server.
NetBIOS / NetBEUI ?