[ns] Help on ns2 internal organization

[Udit Kumar]

Hi Friends,

We say that in ns2 is build using C++ and Tcl language that allow modifying
the topology and simulating without compiling the model again.

Can you please tell me how this is happening, Why there is no need to
recomiple c++ again, Or how data structure is maintained inside ns2/c++ so
that there is no need to recompile again.

Please help on this ASAP, It is urgent for me.

Thanks & Regards,
Udit Kumar