What is the difference between dos command ping and telnet

ping can test connectivity to the target machine. . Ping the domain name can also derive the resolution IP . . Evaluate network quality.
telnet is used to remotely manage connected hosts. . It also tests whether the TCP port of the target machine is open: for
example, the telnet IP address 3389 is used to test whether the port 3389 of the target machine is open. If the connection fails, it may be blocked by the firewall, or the relevant remote desktop service (windows) may not be enabled on the target machine. ), or modified to occupy port 3389 by default .
The combination of telnet and ping is a good way to view the monitoring server status. Many tools rely on these basic commands to achieve monitoring. These two commands are not only valid under dos (windows), but also under linux, and even some hardware settings (switch routers ) are valid