Nmap Network Scanning Guide -

Knowing a port is open isn't enough; you need to know what’s running inside. Alex used ( nmap -sV ) and OS Detection ( nmap -O ).

The scripts cross-referenced the service versions with known CVE (Common Vulnerabilities and Exposures) databases. Within seconds, the screen flashed red: The outdated Apache version was susceptible to a known exploit. Chapter 5: The Final Report (Output) Nmap Network Scanning Guide

Chapter 3: Identifying the Occupants (Service & OS Detection) Knowing a port is open isn't enough; you

Alex didn't just need the data; they needed to present it to their manager. They reran the final scan, saving it in multiple formats ( -oA scan_results )—XML for the technical tools and plain text for quick reading. Within seconds, the screen flashed red: The outdated

The results flickered across the screen: "12 hosts up." Alex had their targets. Chapter 2: Peering Through the Windows (Port Scanning)

The terminal revealed a critical detail: Port 80 wasn't just a generic web server; it was running an outdated version of Apache. Alex also saw that the target was likely a machine. Chapter 4: The Deep Dive (Nmap Scripting Engine)