The document discusses a 100Gbps testbed network built by the Energy Sciences Network (ESnet) to support the transfer of massive datasets used in scientific research. The network connects three supercomputing centers and has been 80% utilized since launching in January. A project used the network to demonstrate a 35 terabyte transfer between two sites that took 30 minutes, compared to an estimated 5 hours on a 10Gbps network. The 100Gbps network provides scientists with critical infrastructure to enable research as datasets continue growing rapidly in size.