From Zach Saw:
LANBench is a standalone simple LAN / TCP Network benchmark utility. It is designed for testing network performance between two computers and is based on Winsock 2.2. LANBench tests TCP performance only and is designed for minimal CPU usage so that the pure performance of your network could be fully tested.
What's new in this version:
Version 1.1.0 allows server address to be a DNS host name.