I'm currently trying to diagnose my working desktop for performance issues with my network card. Found this guide that has a lot of good troubleshooting tips an

I'm currently trying to diagnose my working desktop for performance issues with my network card. Found this guide that has a lot of good troubleshooting tips and solutions, so thought I'd share it here. While here, I also want to ask for more related resources that contains troubleshooting/debugging/solutions for network-related issues, if you have some handy to share.