How are ports determined during the Port Scan phase?

The determination of ports during the Port Scan phase is primarily based on port probes and/or behaviors. This process involves actively testing various ports to identify which ones are open, closed, or filtered. By probing different ports, the system assesses their responsiveness and functionality, allowing for a comprehensive understanding of the network's configuration and any potential vulnerabilities.

Port probing techniques can vary, including methods such as SYN scans, which send a SYN packet to a target port to ascertain its state without completing the TCP handshake. This behavior-based approach provides insights into the ports in use, their status, and the services running on them. As a result, this method is dynamic and adaptable, offering real-time feedback on the ports monitored during a scan.

Other options, such as user-defined settings and manual entry, suggest more static forms of determining the ports. Meanwhile, predefined templates imply a lack of adaptability to the specific network environment being assessed. These approaches do not capture the nuanced and responsive nature of discovering open ports that behaviors and probes facilitate.