What does the target 127.0.0.1/24 tell Nmap to scan?
127.0.0.1/24
A target list stored in a file named 24.
24
The addresses in the /24 subnet, whose mask is 255.255.255.0 and whose final octet identifies hosts.
255.255.255.0
Exactly 24 hosts beginning at the supplied address.
Only TCP port 24 on one host.