Which tool did Kylo use to identify open ports on a target system?

The correct tool used to identify open ports on a target system is nmap. This network scanning tool is specifically designed for network exploration and security auditing. It allows users to discover hosts and services on a computer network, thus identifying open ports and the services running on those ports. Nmap is widely favored because of its versatility and the detailed information it can provide about the network environment.

Tcpdump is primarily a packet analysis tool, useful for capturing and analyzing network packets, but it does not specifically identify open ports. Netstat, on the other hand, is a command-line tool that can show active connections and listening ports on the local machine, but it does not scan remote systems for open ports. Traceroute is used to determine the path taken by packets to reach a destination and does not serve to identify open ports either. Therefore, nmap stands out as the dedicated tool for this specific task, making it the best choice among the options provided.