win7 'telnet' is not recognized as an internal or external command

使用telnet的时候出现如下提示：'telnet' is not recognized as an internal or external command

原因：Win7, Vista, Windows Server 2008 R2下telnet默认是不安装的

解决方法：

Start—>Control Panel—>Programs and Features

Turn Windows Features on or off

选中telnet client

确定即可。