This book constitutes the proceedings of the 7th International ICST Conference, TridentCom 2011, held in Shanghai, China, in April 2011. Out of numerous submissions the Program Committee finally selected 26 full papers and 2 invited papers. They focus on topics as future Internet testbeds, future wireless testbeds, federated and large scale testbeds, network and resource virtualization, overlay network testbeds, management provisioning and tools for networking research, and experimentally driven research and user experience evaluation.