를 전송을 시작하고 중단한다.3. 주어진 Network Topology를 구현하기 위한 Code#Create a simulator objectset ns [new Simulator] ... "$ns at 4.0 "$ftp1 stop"$ns at 4.5 "$cbr stop"$ns at 6.0 "$ftp0 stop"#Detach tcp0 and sink0 agents$ns ... at 6.0 "$ns detach-agent $n0 $tcp0 ; $ns detach-agent $n5 $sink0"#Detach tcp1 and sink1 agents$ns