brian@brian-desktop:~$ nmap -sn 192.168.100.0/24
Starting Nmap 7.01 ( https://nmap.org ) at 2016-05-17 15:09 KST
Nmap scan report for 192.168.100.1
Host is up (0.00066s latency).
Nmap scan report for 192.168.100.2
Host is up (0.000084s latency).
Nmap scan report for 192.168.100.3
Host is up (0.00046s latency).
Nmap scan report for 192.168.100.53
Host is up (0.00066s latency).
Nmap scan report for 192.168.100.68
Host is up (0.095s latency).
Nmap done: 256 IP addresses (5 hosts up) scanned in 2.43 seconds