In this paper, we consider issues pertaining to end-to-end communications and mobility of network end-points in a network where the forwarding is based on data and interest. We view the network as a collection of black boxes, based on a set of recursive rendezvous functions. The boxes hide their internal topology and expose only labels and interest definitions to outside. We study the concept of completeness of network topology and find it useful for understanding and optimizing publish/subscribe based network architectures. We also show that many issues related to making network end points meet on multiple layers, such as mobility, become much simplified and some even trivial. Towards the end of the paper, we outline challenges and future work in this area.
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