Long Fat Networks (LFNs, pronounced like "elephants") are networks with a high bandwidth-delay product.
One of the issues with this type of network is that it can be challenging to achieve high throughput for individual data transfers with window-based transport protocols such as TCP. LFNs are thus a main focus of research on high-speed improvements for TCP.
– Main.SimonLeinen - 27 Oct 2004 - 17 Jun 2005