The traditional view of an IT environment defines clear lines of responsibility between the network infrastructure and the applications groups. The Open Systems Interconnect Reference Model of the ISO divides the network into seven layers, beginning with layer one (the physical wire) and ending with layer seven (the application) Chris Coffin says web-enabled applications could challenge the traditional Grand Canyon divide between infrastructure and applications. Coffin: It should be recognized that a skills gap exists, and that at this point applications people tend to be ahead of the curve, with the network people playing catch-up.”]