Copilotfree, in-browser
Ask me anything about your lessons or your code.
“What is a port?” · “Why is my code erroring?”
Ask me anything about your lessons or your code.
“What is a port?” · “Why is my code erroring?”
How a packet crosses from one network to a completely different one, one hop at a time, with no device ever knowing the full path.
How Routers Move Packets
How a packet crosses from one network to a completely different one, one hop at a time, with no device ever knowing the full path.
Switching and VLANs
How devices on the same network find each other by MAC address, and how one switch gets carved into several isolated networks.
NAT and Private Networks
A house has a dozen devices and one public IP. NAT is the trick that makes that work, and the workaround it never stopped being.
IPv6 and the Modern Internet
IPv4 ran out of addresses years ago; IPv6 is the actual fix, and NAT was only ever the patch.
Network Automation and Infrastructure as Code
Real networks aren't run by typing into one device at a time anymore; they're described in code, reviewed, and applied by a program.