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  1. The Open Cloud Testbed (OCT) provides nodes with Field Programmable Gate Arrays (FPGAs) that are under the complete control of the user and are directly attached to a network switch via two 100Gbps connections. We provide TCP and UDP stacks on the FPGAs. In addition, users have the ability to experiment with their own protocol. We present several experiments which make use of this capability including TCP throughput measurements, an encryption/decryption example, and machine learning inference split across two FPGAs where the images are input on one node and the labelled output available on a second node. The testbed is available for researchers to perform their own experiments, and includes a development platform that allows users to create FPGA applications. Network measurement results show we achieve close to peak bandwidth by tuning appropriate parameters. 
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