Original sentence: Most network equipment and OSs with a TCP/IP stack support some kind of TELNET service server for their remote configuration (including ones based on Windows NT).exe is no longer installed by default, but is still included as an installable feature
Edited sentence: Although it continues to be a mediocre implementation of real UNIX clients it is still included as an installable feature.Most network equipment and OSs with a TCP/IP stack support some kind of TELNET service server for their remote configuration (including some primitive ones with little use based on Windows NT).exe is no longer installed by default