It's not supposed to be this way, here.

First you should be aware that your post will make a lot of people scream "HOMEWORK !",
which must be understand as "we're not here to do your homework !"

So I'd be please to try to answer, if you can formulate your question in a more precise way.
(which Network devices ? which files ? which protocol ?)

Of course, a piece of code, showing that you have thought/worked a little bit on the subject would be a good beginning too...

PS : The Super Search feature of the site may help you a lot, too...

"Only Bad Coders Code Badly In Perl" (OBC2BIP)