Cannot install / Use Telnet using sudo command on Cygwin

I 'm preparing for HDPCA certification and while configuring the HDFS the cygwin terminal shows as the attached image.

Can someone help solve how to install using yum -y install telnet(Says "Yum, Sudo command not found).

@myinbox.durga can you please respond?

Launch Cygwin Installer

Set inetutils To Install

Install inetutils

then try telnet, it should work, please let me know in case of any issues

@Bhanu - Follow this video