He who is Paul in Houston TX said on Tue, 31 Oct 2017 21:02:09 -0500:

You are correct. I was thinking of something else entirely.
Sorry for the confusion.

Well, thanks to your suggestion, I *removed* the router completely from the
equation by setting up a second rooftop radio (let's call it a "modem" for
now).

With this second "modem", I was able to set up a completely separate
network from my normal home network.

The home network has a router but this separate network has just the
desktop computer and the "modem" and that's it.

The routing table was still pretty complex, but the command from Andy Burns
along with the hints from you and Jonathan goes a long way toward
*explaining* why there are so many strange lines.

This is a *great* command for tying together the IP address and the
interface, where the "route print" command doesn't do that directly.

netsh int ip show route

And this is a great command for resetting everything back to defaults:
netsh int ip reset

Thanks!