This article began as an invited lecture at Assumption College in September 2011. The helpful feedback I received from my colleagues there allowed me to develop the lecture into this article in Networking Knowledge. It is hot off the presses! Enjoy! Click here to download a pdf of My article

I encourage you to examine the rest of the excellent special issue at this link: http://journalhosting.org/meccsa-pgn/index.php/netknow/index.