I use USB to connect to modem on my computer. As mentioned here. There are about four main protocols which a USB cable to provide ethernet-style networking. I'm curious to know which one do I use? How can I check it?
You could inspect the USB bus on Linux.
The USB bus is modeled and mounted in
In case you're a Windows user only, I can't help you. But I believe there are means to inspect the USB bus on Windows as well.