Probably something with a rtl8129/39/69 chip. I had a few dozens of those NICs in the late 90s and early 2000s university computer labs I worked at. They’re so common that they’re (almost) a standard in x86 emulation (see qemu, VirtualBox, etc.).
Those realteks are internally still clones on NE2000, with some realtek tweaks and addons.
they still had linux kernel bugs, I remember having to port a freebsd fix to linux to get it to work in a cloud/farm application where collisions could make ALL the cards on every devices go out to lunch for 10 minutes