Windows7 telnet command analysis

        I once needed to telnet to the client's blade fiber switch module for configuration, but when I opened the CMD input telnet command that comes with windows7, the system prompts me that "not internal or external commands are not runnable programs or batches." ". My first feeling is that the CMD function has failed, so I tried the ping command again. The strange thing is that the ping function can be used normally. At this time, I thought that this function may not be enabled on telnet on windows7. Then open the "Control Panel", find the program and function, and then click the "open or close windows function" in the upper left, and the windows function dialog box will pop up. There are many small windows functions in this dialog box, and then find Telent Client, check the box and confirm!