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

https://www.cyberdaily.au/strategy/14271-why-physical-network-infrastructure-is-the-overlooked-foundation-of-your-cybersecurity-strategy

Cybersecurity starts before the firewall, with the cables, ports and switches carrying every connection. A bad patch lead can make VPN handshakes fail, while default switch credentials can give an intruder a path across the office