From Moojit Networks:
DataMover for Networks is a winsock application that performs benchmarking and functional level testing on IPv4 and IPv6 network endpoints. The solution consists of a client and server application that run on different machines. The client is capable of performing I/O to multiple servers simultaneously, and the server is capable of servicing multiple clients simultaneously.
Version 1.8.6 may include unspecified updates, enhancements, or bug fixes.