[Disclaimer: I'm a complete networking novice, and this question might not even be well suited for this site. I welcome pointers to other stack exchanges if appropriate.]
I'm trying to connect a device (a laser, to be specific) to a PC via ethernet, with the eventual goal of connecting to it via a remote desktop program while I'm working from home. The laser's manual describes how to do this, and it involves setting the PC's ethernet connection to have a fixed IPv4 address. This prevents the PC from connecting to the internet, though, which defeats the purpose for me.
My main question is:
What might be some workarounds to this issue?
If someone could explain why the PC's ethernet address needs to be set to a specific value for the laser to talk to it, that would be helpful too. I'm happy to provide more details on my setup as needed, but I'm not sure which details are relevant.