If you do not know the name Mark Russinovich you need to get to know his work. He started out hacking the windows kernel and building some absolutely awesome utilities used by System Administrator and Hackers alike.
In 2005 he discovered the Sony rootkit in Sony DRM products. Its function was to prevent users from copying their media. He is also the creator of Winternals Software. A great library of system tools for Windows administrator or anyone who wanted to Hack on their system. In 2006 Mark went to work for Microsoft when Winternals was acquired.
PsPing is a command-line utility for measuring network performance. In addition to standard ICMP ping functionality, it can report the latency of connecting to TCP ports, the latency of TCP round-trip communication between systems, and the TCP bandwidth available to a connection between systems. Besides obtaining min, max, and average values in 0.01ms resolution, you can also use PsPing to generate histograms of the results that are easy to import into spreadsheets.
Usage: psping -? [i|t|l|b]
|-? I||Usage for ICMP ping.|
|-? T||Usage for TCP ping.|
|-? L||Usage for latency test.|
|-? B||Usage for bandwidth test.|
So go get the download and get to Hacking!