sentences:  Clean Slate was based on the belief that the current Internet has significant deficiencies that need to be solved before it can become a unified global communication infrastructure, and that the Internet's shortcomings will not be resolved by the conventional incremental and backward-compatible style of academic and industrial networking research.The research program focused on unconventional, bold, and long-term research that tries to break the network's ossification.To this end, the program was characterized by two research questions