A secure network starts with the cables, ports and switch settings people...

https://wiki-wire.win/index.php/How_to_Check_If_Your_Network_Is_Ready_for_a_Zero-Trust_Approach

A secure network starts with the cables, ports and switch settings people rarely see. A misplaced patch lead can send traffic where it shouldn’t; default switch passwords can help an intruder move across the office. See why the basics matter.