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Recently, security in inter-data center communication has been attracting users attentions．The existing data center communications are based on VPN technology using IPsec. However, if there is an eavesdropper, on some route, there may be some risks that encrypted packets are decrypted．The authors, using a DRT (Disaster Recovery Technology) [1] has been proposed the method to apply it to the SDN (Software Define Network) and clarified its effectiveness．In this paper, We compared the case of using the UDP and TCP tunneling between multiple paths, end-to-end throughput and reports the results of the performance evaluation．
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