ACK suppression?

[Mat S. <sc...@gm...>]

Hi, I've been using iperf to get some speed metrics and one of our  
network technicians asked me if iperf (or the OS of the box) was  
doing ACK suppression.

I'm not even totally clear on how ACK suppression works, but my  
research so far points toward it happening at a router rather than on  
the box itself.  Which would take it out of iperf's hands.

But I thought I'd ask here, since I'm sure you are all much more  
knowledgeable than I on these and other networking topics.

Thanks in advance,
Mat