Cybersecurity starts before the firewall: with the cables, ports and switches...

https://yenkee-wiki.win/index.php/What_Is_the_Minimum_Cabling_Standard_for_New_Installs_Now%3F

Cybersecurity starts before the firewall: with the cables, ports and switches carrying every connection. See how overlooked basics can open a way in, like default switch credentials letting an intruder move across the network.