You are looking at a very old, but free version of the course.
If you are interesed the most recent version, check it out
on the Perl Maven site.
As we saw earlier Expect.pm with some low level networking protocol can be used to
access any device that can be connected via some cable.
Or without a cable.
But you might not want to implement the whole protocol, or you might not
have a command line tool that can access the device remotely.
Or you don't want to use it as you'd like to test that separately.
You can use the built-in telnet/ssh/ftp/tftp clinets in your Unix/Linux machine.
If you are interested in on-site trainings by the author, please
contact me directly.