You connect your laptop to a Wi-Fi network. A few seconds later, it has an IP address, knows where to send packets, and can browse the web. Two protocols just happened invisibly: DHCP gave you the address, and NAT lets you share one public IP with millions of others. Both are 25+ years old and run on essentially every network you'll ever use.
Engineering Craft
TypeScript, CI/CD, databases, observability -- the skills that make code production-ready.