networkspeedtest - a free network bandwidth test application

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Network performance problems can cause a variety of difficult to diagnose application performance problems.  It can be necessary to test the bandwidth of the network to verify whether the bandwidth is as expected.
Network speed test is a free, simple network test application that will copy files from one test server to another, showing the network bandwidth used in bytes per second.  This could be compared to a previous baseline to show a network problem.  For example, if 50 MB/sec of bandwidth was previously seen between two test servers, and now there is 1 MB/sec between the same two test servers, there is likely a network problem.

Installation
Unzip networkspeedtest directory to c:\temp


USAGE
copyto <SERVERNAME> repeat

(Copies current directory to SERVERNAME\c$\temp\networkspeedtest showing network speed in bytes per second.)
(repeat parameter causes it to repeat the operation indefinitely)


EXAMPLE
(Shows network bandwidth of 48 MB/sec from current server to SERVER1)

C:\Temp\networkspeedtest> copyto SERVER1 repeat

-- Speed of copying files of varying sizes to SERVER1 in bytes per second
    Speed :            48339531 bps.
    Speed :            58255333 bps.
    Speed :            41308327 bps.
    Speed :            48339531 bps.
    Speed :            48339531 bps.
    Speed :            48339531 bps.
    Speed :            48339531 bps.
    Speed :            48339531 bps.
    Speed :            48339531 bps.
    Speed :            48339531 bps.
    Speed :            41308327 bps.
    Speed :            58255333 bps.
    Speed :            48339531 bps.
    Speed :            41308327 bps.

The following shows windows task manager networking tab during this test: