This document provides an overview of peer-to-peer (P2P) infrastructure and characteristics according to researcher Juhana Venäläinen. It discusses five components of P2P infrastructure including technological, communication, software, legal and cultural infrastructure. It also lists six characteristics of P2P including distributed networks, inclusive communities, horizontal process management, flexible hierarchies, distributed leadership and a non-reciprocal gift economy. Finally, it examines issues around the production and measurement of value in networking commons and sharing cultures.