Single stream load for Iperf

[Sahadevan, S. j. d. <sam...@in...>]

In the FAQ for iperf 

http://dast.nlanr.net/Projects/Iperf/iperf_faq.php

 

They have the following question and answer,

 

 How does Iperf measure available bandwidth?
Iperf sends packets from the client to the server as fast as it can, of
course being limited by several factors (more information about
increasing the speed can be found in this FAQ and in the user
documentation
<http://dast.nlanr.net/Projects/Iperf/iperfdocs_1.7.0.html> ). The
information is sent by default from the client's memory to the server's
memory to attempt to eliminate some hardware speed limitations.
Note that high bandwidth networks often require multiple streams to max
out the bandwidth.

 

I have a few things I didn't completely understand.

 

1)       How much is high bandwidth (is 1GB a high bandwidth (because I
am using a 1GB P-P connection))?

2)       What limits a single stream from achieving high bandwidth? 

 

Any help is greatly appreciated!

 

Thanks,

Samson