Qcheck is a free network performance utility by NetIQ.
It's free because it's a subset of NetIQ's more comprehensive
network performance analysis tools. NetIQ hopes you like
what you see and will want to buy the more expensive (and fully
featured) stuff. You can download it from here.
Qcheck has a very intuitive interface and has lots of good on-line
help, which you can view
The Qcheck help pages accessed by the link above are normally
installed on your computer when you install Qcheck. They are
provided here as a convenience and are Copyright © NetIQ Corporation,
1995-2001. All rights reserved.
We use the following Qcheck tests in our product
TCP Response Time:
This test is very similar to "ping" and tells
you how long it takes another machine to respond. This
measurement is commonly referred to as "lag" or "latency".
We use 10 iterations of 100 byte data size unless otherwise
Tests the time it takes to transfer a block of data from
one computer to another. Sometimes called "bandwidth",
it's a measure of your network's raw transfer speed. We
use 1000kByte test data size unless otherwise noted
UDP Streaming: [description from Qcheck Help
"Streaming tests, like multimedia applications, send
data without acknowledgments. In Qcheck, streaming uses the
connectionless protocols IPX or UDP. Qcheck's streaming tests
emulate the behavior of applications that use streaming, such
as Voice over IP and video broadcasts. This test indicates how
much bandwidth your multimedia traffic might need and makes
it easy for you to compare the speed of your network hardware
with the actual data rate your network is achieving."
We run this test as a way to check how well devices
can keep up with non TCP data and as a way to test the efficiency
of a router. We usually run a 10 second test, but the
rate depends on what the device under test will bear and is
noted in the review.