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The MobilityFirst project is founded on the premise that the Internet is approaching an historic inflection point, with mobile platforms and applications poised to replace the fixed-host/server model that has dominated the Internet since its inception. This predictable, yet fundamental, shift presents a unique opportunity to design a next generation Internet in which mobile devices, and applications, and the consequent changes in service, trustworthiness, and management are primary drivers of a new architecture. The goal of MobilityFirst is to better accommodate mobile entities on the Internet in a scalable, trustworthy, and useable manner. Inherently a clean-slate project, MobilityFirst takes a radical approach to redesigning the Internet including rethinking end-point naming, such as through IP, and connection-oriented protocols, such as TCP. At a high level, MobilityFirst allows applications to securely interact with abstract, mobile entities in a connectionless fashion, providing connectivity and minimal user-disruption in the presence of mobility.