What is an example of a reconnaissance attack tool that will cycle through all well-known ports to provide a complete list of all services that are running on the hosts?

An example of a reconnaissance attack tool that cycles through all well-known ports to provide a complete list of all services running on the hosts is NMAP (Network Mapper). NMAP is a powerful and versatile port scanner used for network discovery and security auditing. It can be used by network administrators to identify what devices are running on their networks, discovering hosts that are available and the services they offer, finding open ports, and detecting security risks. It is also commonly used by attackers for reconnaissance purposes to find potential vulnerabilities.