Quickly install telnet on windows 10

We used to install telnet from control panel "features". 

In Windows 10, a quick way is executing following command in an admin cmd.

dism /online /Enable-Feature /FeatureName:TelnetClient

But it does require restarting the pc. 

A quicker way is just copying the telnet.exe from another machine. It will be efficient if you are just using it to check whether a port is opened.

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Feng