For more than three decades now, the Internet’s endto- end model has functioned remarkably well. This model has allowed the evolution of a transparent network architecture that efficiently supports the transport of data without caring what the data it-self represents . Furthermore, being transparent and application-neutral has
facilitated the creation and evolution of new Internet applications and services that operate on the same thirtysomething network architecture—which until recently had not required any major overhaul.
Unfortunately, the landscape is changing. Today, the Internet has grown to be a million-network network, which is something with startling consequences. For instance, one of the most publicized consequences of this growth has been the depletion of the Internet’s address space. Initially, the Internet’s address space consisted of 232 addresses—about 4 billion addresses. Today, however, that amount is insufficient, even more if we consider emerging new technologies such as 3G/4G wireless devices and other wireless appliances .
This document is in PDF format. To view it click here.