[ns] Unite in NS2 topology (m or km) ??

[El hadi Cherkaoui]

Dear all,

I want to know what is the default unite of distance in NS2, (metter or 
kilometer )
when I create a sample topology:

set opt(x) 100 ;# m or km???
set opt(y) 100
set opt(z) 50

set topo  [new Topography]

$topo load_cubicgrid $opt(x) $opt(y) $opt(z)

Regads