How to turn off network ports to protect computer security

turning off unnecessary network ports can effectively protect network security, so do you know how to shut down these network ports ?

We can enter the service and close the corresponding port in the following way.

Turn off Port 7.9: Close Simple TCP/IP service and support the following TCP/IP services: Character generator, daytime, discard, Echo, and Quote of the day.

Turn off 80: Turn off the WWW service and display the name "World Wide Web Publishing Service" in "services" to provide Web connectivity and management through the Internet information Services snap-in.

Turn off port 25: Turn off the Simple Mail transport Protocol (SMTP) service, which provides the ability to transfer e-mail across the network.

Turn off Port 21: Turn off the FTP Publishing service, which provides FTP connectivity and management through the Internet information Services snap-in.

Turn off Port 23: Turn off the Telnet service, which allows remote users to log on to the system and run the console program using the command line.