some implementatin questions about NS

[Ming Lei <leim01@student.ucr.edu>]

I am currently working on my master thesis using NS as a simulator. I met
several problems on that. I am wondering whether you can help to some
extent. I know your email address from the NS tutorial web page.
These questions are very detailed implementation issues.

(1)
In the real implementation, the IP process will be blocked if it tries to
send at speed higher than the link speed. I do not how this is simulated
in NS. 

(2) The packet send path
agent
node entry (classifier)
address classfier
link_head
queue_
....

Is the queue_ here an object of the queue class in c++. Does it simulate
the buffer at the network interface? 

Your replay is highly appreciated.

----
Ming Lei
Dept. of Computer Science,
UC, Riverside
Tel: (909)787-2893