The Internet Layer
If transmission has seen dramatic changes in the past decade then what has happened at the IP layer over the same period?
The glib answer is "absolutely nothing"! But that answer would be gliding over a large amount of activity in this area. We've tried to change many parts of IP in the past decade, but, interestingly, none of the proposed changes have managed to gain any significant traction out there in the network, and IP today is largely no different from IP of a decade ago. Mobility [1], Multicast [2] and IP Security (IPSec) [3] remain poised in the wings, still awaiting adoption by the mainstream of the Internet.
