Which Windows tool is used to test connectivity to a specific port or service?

The tool used to test connectivity to a specific port or service is Telnet. Telnet allows users to connect to remote devices over a network and can specify a particular port to communicate with. By using Telnet, a technician can attempt to establish a session with a specified service on a remote server (for example, connecting to a web server on port 80 or to an email server on port 25). If the connection is successful, it indicates that the port is open and the service is running, while a failure to connect suggests that either the port is closed or the service is not operational.

Ping is primarily used to check the reachability of a host on a network using ICMP packets but does not work at the port level. Traceroute is a diagnostic tool that tracks the path packets take to reach a specific destination, focused on the route rather than the connectivity of specific ports. Netstat is a command-line utility that displays network connections, routing tables, and statistics for network interfaces but does not test connectivity to a port in the way Telnet does.