$ nmap 10.0.0.0/24
Starting Nmap 5.21 ( http://nmap.org ) at 2010-12-11 15:53 MSK
Nmap scan report for 10.0.0.1
Host is up (0.017s latency).
Not shown: 995 closed ports
PORT STATE SERVICE
21/tcp open ftp
23/tcp open telnet
80/tcp open http
139/tcp open netbios-ssn
631/tcp open ipp
Nmap scan report for 10.0.0.105
Host is up (0.00013s latency).
Not shown: 994 closed ports
PORT STATE SERVICE
139/tcp open netbios-ssn
445/tcp open microsoft-ds
515/tcp open printer
6000/tcp open X11
7741/tcp open unknown
8080/tcp open http-proxy
Nmap done: 256 IP addresses (2 hosts up) scanned in 15.73 seconds