some usefull tools like telnet.exe are disabled by default in Windows Vista and later version. You can enable this and other features by command line using dism.
dism called with the get-features parameter lists all available features and its current state.
Note: Featurenames are case sensitive.
C:\>dism /online /Get-Features
..... Feature Name : TelnetServer State : Disabled Feature Name : TelnetClient State : Enabled ......
and the Enable-Feature option install them