Exploring The Fundamentals

This instructional blog post introduces Nmap fundamentals for beginners, covering TCP vs UDP, host discovery methods (-sn, -sL), TCP connect (-sT) versus SYN “half-open” scans (-sS) and their stealth/detection trade-offs, interpreting open/closed/filtered responses, service fingerprinting with version detection (-sV), and leveraging default NSE scripts (-sC), all framed within a training context to illustrate practical scanning techniques and their operational implications.