24 // - UDP flows from n0 to n1 and back

    24 // - UDP flows from n0 to n1 and back

    25 // - DropTail queues 

    25 // - DropTail queues 

    26 // - Tracing of queues and packet receptions to file "udp-echo.tr"

    26 // - Tracing of queues and packet receptions to file "udp-echo.tr"

    27 

    27 

    28 #include <fstream>

    28 #include <fstream>

    30 #include "ns3/core-module.h"

    29 #include "ns3/core-module.h"

    31 #include "ns3/helper-module.h"

    30 #include "ns3/helper-module.h"

    32 

    31 

    33 using namespace ns3;

    32 using namespace ns3;

    34 

    33