Christopher S. Yoo, the John H. Chestnut Professor of Law, Communication, and Computer & Information Science at the University of Pennsylvania and author of the new book, The Dynamic Internet: How Technology, Users, and Businesses are Transforming the Network, explains that the Internet that we knew in its early days—one with a client-server approach, with a small number of expert users, and a limited set of applications and business cases—has radically changed, and so it may be that the architecture underlying the internet may as well.