I have several questions about
nmap can detect servers via:
What are the differences (not in the layer, but in the way that
nmap does it) and how does
nmap do this?
Second, when I port scan with
nmap, the UDP scan takes much longer then the TCP scan. Why?
Third: are there any different methods to explore the OS then to use the
-O --osscan-guess command (I mean totally different, not e.)?