Telnet is a very useful command for server administrators. To install telnet on Windows Server 2016 Run on power shell. On command promt, run Windows Server 2012 RHEL/CentOS Ubuntu/Debian
Telnet sends clear text passwords and usernames through logins and should be disabled on all web servers and replaced with SSH. Some hosting providers are not disabling telnet by default but you should ensure that it has been turned off