In 1995 a Finnish researcher's university network was sniffed, thousands of passwords stolen in cleartext off the wire. His weekend fix became SSH, then a company, then a licensing fight, then an OpenBSD fork that now guards essentially every server on earth. This is how remote access got encrypted.
Remote-Access
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The Story of SSH: How a Stolen Password Became the Internet's Front Door -
PiKVM and JetKVM: Remote Console Access for Real Servers A practical guide to KVM-over-IP for homelabs: PiKVM v4 vs JetKVM vs the alternatives, ATX power control, IPMI/Redfish integration, Tailscale for remote access, and how to cover a full rack with one or two devices.