ABSTRACT
The Internet has been around for more than three decades now. A key factor for its longevity is its flexibility to incorporate new technologies. However, this is not always a seamless process, as some of these new technologies break the basic assumptions under which the Internet works. For instance, the Internet was born at a time when all nodes in a network were fixed devices. Therefore, all the basic protocols were designed assuming that the end-points would stay fixed. Obviously, with the recent arrival of mobile networking devices (PDAs, laptops, 3G phones, etc.), these assumptions no longer hold.
