ARPANET standardized TCP/IP on this day in 1983 — 43-year-old standard set the foundations for today’s Internet

On January 1, 1983, ARPANET system architects initiated the cutover from the existing NCP to TCP/IP on all hosts.

Start-up plans to use terahertz radio frequencies for communication between servers instead of copper or optical connections — radio-based interconnections offer 1.6 TB/s using half the volume of copper

When copper is not enough and yet optical interconnections are overkill, waveguide-based cables can do the job.