Which two flags were used in previous versions to indicate no host discovery?

Which two flags were used in previous versions to indicate no host discovery?

• A. -P0 and -PN
• B. -Pn and -e
• C. -S and -f
• D. -Pn and -S

Answer: (A)

Disabling host discovery means telling Nmap not to probe whether hosts are up before scanning ports. In older Nmap versions this was done with -P0. In newer versions the same effect is achieved with -PN, which skips the host discovery step. So these two flags come from different eras but serve the same purpose: instructing Nmap to proceed with scanning without first checking if each host is online. This is handy when you know hosts exist, when discovery probes are blocked, or when you want a faster scan by skipping the initial reachability checks. Other options in the list control things like the interface, source address spoofing, or fragmentation, not whether host discovery is performed.

Disabling host discovery means telling Nmap not to probe whether hosts are up before scanning ports. In older Nmap versions this was done with -P0. In newer versions the same effect is achieved with -PN, which skips the host discovery step. So these two flags come from different eras but serve the same purpose: instructing Nmap to proceed with scanning without first checking if each host is online. This is handy when you know hosts exist, when discovery probes are blocked, or when you want a faster scan by skipping the initial reachability checks. Other options in the list control things like the interface, source address spoofing, or fragmentation, not whether host discovery is performed.