Data link layer (ARP): scanning speed, but only in the same network segment scan.
arping command:
-c only send count requests
-d find duplicate replies Duplicate IP addresses
Host found:
arping -c 1 192.168.1.1
# If the host survive, it will return to its MAC address
arping -d 192.168.1.1 if repeated response, ARP gateway spoofing may occur, stealing traffic, man in the middle attacks
About two-story shell instance found under View arping.sh find directories and arping2.sh
namp command
Advantages: may scan a network
-sn only host discovery, port scanning without
namp -sn 192.168.1.0/24 to 192.168.1.1-254 scanning survival host and perform DNS PTR reverse lookup
