Skill
Packets, ports, DNS, TLS. You cannot secure what you cannot picture.
Curated resources
Scores are LearnPath editorial opinions (clarity, cost, freshness, project density) — not an objective ranking. Every YouTube item is embedded officially after a click-to-load facade.
5hBest for beginnersfreeCodeCamp / NetworkChuck5h
Draw the OSI/TCP diagrams yourself while watching.
12h 19mLearnPath pickfreeCodeCamp.org12h 19m
Twelve hours published February 2026 — the most complete and current networking course verified: OSI and TCP/IP models, Ethernet, IP addressing, routing, DNS, HTTP, TLS, plus troubleshooting with real tools.
20 minAnson Alexander20 min
Twenty minutes with Wireshark on real traffic: capture, filters, following streams, and spotting scanning activity. The practical packet-analysis skill that makes networking concrete.