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?”
Hosts, addresses, packets, and the equipment in between: the picture every other lesson draws on.
What Is a Network
Hosts, addresses, packets, and the equipment in between: the picture every other lesson draws on.
The OSI Model
Seven layers, what each one actually does, and why the layer of an attack decides where the attacker has to be standing.
IP Addressing and Subnetting
What an IP address actually says, how the slash in 10.0.5.0/24 splits it, and why that split decides whether a packet goes straight to a neighbor or out through a router.
TCP, UDP, and Ports
An IP address finds the machine. A port finds the program. This is how one host keeps a hundred conversations straight, and why a scanner can hear which ones are open.