Which tool will a security administrator MOST likely use to confirm unnecessary services running on a server?

A security administrator would most likely use Nmap to confirm unnecessary services running on a server because Nmap is a powerful network scanning tool designed to discover hosts and services on a network. It can provide detailed information about the services running on a server, including ports that are open and the corresponding services associated with those ports. By using Nmap, an administrator can effectively identify which services are active and potentially unnecessary, allowing for better security management and hardening of the server.

In contrast, Wireshark is primarily a network protocol analyzer that captures and inspects data packets flowing through a network rather than identifying services running on a server. Autopsy is a digital forensics tool for analyzing hard drives and file systems, which is not relevant for checking active network services. DNSEnum is a DNS enumeration tool focused on gathering DNS information, rather than assessing active services on a server. Each of these tools serves a distinct purpose, but Nmap is specifically tailored for evaluating and auditing network services.