Hi everyone, I need to know how to cofigure simplex-link (ex: $ns simplex-link $S $r 2mb 100.0ms DropTail) for a node and specfing the MAC type as in $ns make-lan command (ex:$ns make-lan "$n1 $n2" $bw $delay LL Queue/DropTail Mac/Csma/Cd) I'm looking forward to receive from you ASAP. your help is appreciated. Bolbol