This talk introduces GENI, the National Science Foundation's ambitious plan to build a national infrastructure suite to enable research into Network Science and Engineering for future global communications networks. GENI has just entered Spiral 1, a new stage in its development. Early prototyping is now beginning, which will offer illumination into its construction plans and research potential. The first round of software, hardware, and trial facilities are now being built by academic and industrial research teams. This talk presents current plans for GENI, but leaves plenty of time for discussion and brain-storming, both for the eventual infrastructure suite and for prototypes that will be built in the coming year.

All analytical and simulation research on ad~hoc wireless networks must necessarily model radio propagation using simplifying assumptions. We provide a comprehensive review of six assumptions that are still part of many ad hoc network simulation studies, despite increasing awareness of the need to represent more realistic features, including hills, obstacles, link asymmetries, and unpredictable fading. We use an extensive set of measurements from a large outdoor routing experiment to demonstrate the weakness of these assumptions, and show how these assumptions cause simulation results to differ significantly from experimental results. We close with a series of recommendations for researchers, whether they develop protocols, analytic models, or simulators for ad~hoc wireless networks.

Roaming across wireless networks and providers works reasonably well in the world's cellular systems but not in the Internet. That's not surprising since the Internet was never designed to accommodate mobile endpoints. Despite a decade of hope for mobile IP, it has not yet gained popular acceptance. This paper proposes a more radical approach to Internet mobility, one that fundamentally severs the traditional connection between a host's IP address and its session endpoint identifier, thus allowing a computer to move from network to network, and provider to provider, without disrupting its active sessions. This approach can be viewed as a marriage of cellular mobility techniques with the Internet protocol suite, and may leverage existing Internet mechanisms for access control and cellular mechanisms for roaming agreements. For clarity, we present a notional sketch of the resultant IPv6 mobility architecture.

BBN, Harvard, and Boston University are building the DARPA Quantum Network, the world's first network that delivers end-to-end network security via high-speed Quantum Key Distribution, and testing that Network against sophisticated eavesdropping attacks. The first network link has been up and steadily operational in our laboratory since December 2002. It provides a Virtual Private Network between private enclaves, with user traffic protected by a weak-coherent implementation of quantum cryptography. This prototype is suitable for deployment in metro-size areas via standard telecom (dark) fiber. In this paper, we introduce quantum cryptography, discuss its relation to modern secure networks, and describe its unusual physical layer, its specialized quantum cryptographic protocol suite (quite interesting in its own right), and our extensions to IPsec to integrate it with quantum cryptography.