whitehartstag writes "TCP/IP is 25 years old this year. Vint Cerf says there was a long development cycle for both TCP/IP and for X.25, and we'd have been using TCP/IP much sooner if TCP/IP had been more marketable. 'Over the years, we can come up with many examples both of where the best technology did (or did not) win and of how marketing has defined a service. For example, many of the "best" features of frame relay, such as the ability to use Switched Virtual Circuits (SVC) in addition to Permanent Virtual Circuits (PVC) were never widely marketed because the pricing was too complex. Rather, the PVC was a simple replacement for a leased line at a fraction of the cost with better performance.'"