Network discovery

netdiscover

netdiscover(8) - active/passive ARP reconnaissance tool

netdiscover -i eth0

netdiscover -r <ip>/24

nmap

nmap -sn <ip>/24

bash

for i in {1..255}; do (ping -c 1 xxx.xxx.xxx.${i} | grep "bytes from" &); done

powershell

$ping = New-Object System.Net.Networkinformation.Ping
1..254 | % { $ping.send("xxx.xxx.xxx.$_") | select address, status }