Diaspora is a distributed social network. Unlike centralized social networks (eg, Facebook), Diaspora has no central system that owns all user data. Distributed pods act as web servers, and connect to other pods, forming a connected social network.
A social network is a social structure made up of a set of actors (such as individuals or organizations) and the dyadic ties between these actors. The social network perspective provides a clear way of analyzing the structure of whole social entities.