Which option enables a TCP ACK Ping to ports 100 and 90?

Which option enables a TCP ACK Ping to ports 100 and 90?

• A. -PT100,90
• B. -PA100,90
• C. -PR
• D. -oN

Answer: (B)

TCP ACK ping is a host-discovery method that sends TCP ACK packets to specific ports to see if a host responds, which helps determine if the host is up when ICMP probes might be blocked. The option that selects this TCP ACK ping and lets you list ports to probe is the one that uses -PA followed by a comma-separated port list. So -PA100,90 tells Nmap to perform a TCP ACK ping to ports 100 and 90, checking for a live response from the target. The other options don’t perform this exact probe: one represents a different ping method, another uses ARP (which only works on local networks), and the last is not a ping option at all.

TCP ACK ping is a host-discovery method that sends TCP ACK packets to specific ports to see if a host responds, which helps determine if the host is up when ICMP probes might be blocked. The option that selects this TCP ACK ping and lets you list ports to probe is the one that uses -PA followed by a comma-separated port list. So -PA100,90 tells Nmap to perform a TCP ACK ping to ports 100 and 90, checking for a live response from the target. The other options don’t perform this exact probe: one represents a different ping method, another uses ARP (which only works on local networks), and the last is not a ping option at all.