cas: beckman lecture Technology and Policy Challenges for the Internet in 2007 The Internet continues to expand and the applications for it continue to multiply. The billion users of today are rapidly increasing to two or more billion that use the Internet through mobile devices. There are challenges of scale still to be solved and the transition to IPv6 is less certain than is desired. Security problems remain a major challenge at all levels of the system's architecture. In application space, streaming and large file exchanges are pushing the limits of access and core speeds. Mobile Internet operation is far from satisfactory. While indexing and searching continue to advance, bit rot is setting in (links that fail, sites that disappear, files in old format that are not interpretable among other things). The Asymmetry of broadband inhibits the trend in user-produced content. Coping with network partitioning and multi-homing are still unsolved problems. Extension of the Domain Name System to include UNICODE characters has technical and policy challenges. The business of the domain name system itself is a major challenge and addition of internationalized top level country code domains is a policy conundrum. Geographic indexing, temporal indexing, searching of images and more complex formats offer plenty of room for a dozen dissertation topics. Social networking, online health care records, online financial transactions, privacy offer their own sets of difficulties to be overcome. Finally, the extension of the Internet to operate across the Solar system continues to be one focus of attention at the Jet Propulsion Laboratory and NASA.