I learned a lot at my student job in the university IT department troubleshooting why I could boot from my Xserves NetBoot server in one room but not another.

I learned a lot at my student job in the university IT department troubleshooting why I could boot from my Xserves NetBoot server in one room but not another. The rest I learned in the last year by switching to pfSense/Opnsense for my router/firewall.