cybersecurity / network security

Network Security, Free

Most attacks travel over the network — so understanding traffic is a security superpower. Learn the fundamentals, then master the two tools every practitioner lives in: Wireshark and Nmap. All resources free and current.

To secure a network you first have to see it. Network security is about understanding how packets flow, spotting what shouldn't be there, and knowing how attackers probe and pivot. Build the foundations with a structured course, then get fluent with Wireshark (to inspect traffic) and Nmap (to discover and map hosts) — the two tools you'll use in almost every engagement.