Cyberspace is a socio-political and technological domain with unique characteristics. Its decentralized nature and the fact that it is mostly owned and managed by the private sector raise a number of questions regarding the most effective model of governance. Viewing cyberspace as a global commons, balancing between state sovereignty and the fragmentation of cyberspace, and debating between multilateralism and multi-stakeholderism makes discussions of cyberspace governance quite complex. The cases of ITU, ICANN, IGF, UN GGE, and NETmundial raise issues of legitimacy and accountability and offer a pragmatic insight into the power politics of cyberspace.