[ns] File format explain

[James]

Dear all,

I am new to NS2. And try to figure out the easy example now.

The example now has following scipt:

    set mtcpsink_0 [new Agent/TCPSink]
    $mtcpsink_0 set_filename tcpap_sink_0

which would generate a file, obviously.

But I just could not figure out what the file stands for?

The file is like this format:

1                0.171731         40
2                0.270314         1500
3                0.392966         1500
4                0.744979         1500
5                0.779175         1500
6                0.882837         1500
7                1.027826         1500
8                1.095344         1500

I could understand about tr file since there are many examples from the
internet. But this confuses me.

Could any one help me about that?

Thanks.

Brs,
James