Existing techniques can geolocate an IP address to a metropolitan area. Through simulation, we evaluate the performance of these existing techniques within a metropolitan area network. We identify differences between metropolitan area networks and the wide area network. We describe and evaluate new techniques which are designed specifically for use on metropolitan area networks. We present Hop-...

Abstract Quantum key distribution (QKD) enables secure exchanges between two remote users. The ultimate goal of communication is to establish a global quantum network. existing field tests suggest that networks are feasible. To achieve practical network, we need overcome several challenges including realizing versatile topologies for large scales, simple network maintenance, extendable configur...

We describe the architecture and design of an optical WDM ring network suited to local, campus and metropolitan area applications. The proposed architecture is flexible and robust, is compatible with existing local and metropolitan area network standards, has the potential for low-cost implementation and offers an elegant upgrade path to larger numbers of nodes and higher bit rates. We discuss ...

A wide area quantum key distribution (QKD) network deployed on communication infrastructures provided by China Mobile Ltd. is demonstrated. Three cities and two metropolitan area QKD networks were linked up to form the Hefei-Chaohu-Wuhu wide area QKD network with over 150 kilometers coverage area, in which Hefei metropolitan area QKD network was a typical full-mesh core network to offer all-to-...