There were a number of resources I used in making this paper.
If anyone wishes to distribute this tutorial then feel free, just give it credit where due, and a link to
Perhaps you should give credit where it's due. Nearly every line of your tut (if not all) is ripped.

You have been owned by Google.

http://www.mcmcse.com/study/netguide.shtml

You didn't even catch this part:
The picture below shows how WAN’s and LAN’s interact with the internet:
May I be the first to say...

Busted!