Networking & Systems
TCP/IP, OS administration, and infrastructure fundamentals.
3 resources
Beginner
Professor Messer — Free Network+ N10-009 Course
Free CompTIA Network+ video course and study notes. Covers OSI model, TCP/IP, subnetting, routing protocols, and network…
Beginner
SANS Cyber Aces — OS & Networking
Free foundational courses from SANS covering Windows/Linux OS internals and core networking concepts. Great starting poi…
Beginner
TryHackMe — Pre-Security Path
Beginner-friendly path covering networking basics, how the web works, and Linux/Windows fundamentals. Recommended first …