crackerbox# Nmap -sP 192.168.10.0/24
Starting Nmap V. 3.00 (www.insecure.org/Nmap/)
Host (192.168.10.0) seems to be a subnet broadcast address (returned 3 extra pings).
Host kristen (192.168.10.6) appears to be up.
Host richard (192.168.10.10) appears to be up.
Host brandt (192.168.10.15) appears to be up.
Host nancy (192.168.10.29) appears to be up.
Nmap run completed -- 256 IP addresses (4 hosts up) scanned in 154 seconds