[ns] Wired network losses

[Adam Hunt]

Dear ns users,

I am looking at general relationships between the various parameters in a 
wired network and have got some unexpected results. It seems that there is 
no real loss in available throughput when the transmission distance is 
increased. However, mathematical equations show significant losses over 
large distances (e.g. 1000m). My tcl code is based on the first few examples 
in Marc Greis' tutorial. I was wondering if there is some extra code that 
needs to be used to include losses (like the shadowing propagation used in 
wireless networks).

Any advice much appreciated,

Adam

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