[ns] Link delay, what is it?

[Huan Pham <huan@cs.jcu.edu.au>]

Hi NS users,

My understand is that the Delay of a packet over a link consists of 4
elements:

1 - Queueing Delay
2 - Processing Delay
3 - Propogation Delay (negligible for most scenario, excluding satelite)

4 - Transmission Delay (= packetSize / Bandwidth)

My question is, in NS, when we set a delay for a link, what delay we
mean here. Of course it not the queueing delay, transmission delay. So I
believe it must be a sum of the processing delay and the propogation
delay. IS THAT CORRECT? If so, is that value the same for all packets
regardless of their packet sizes? It's questionable, as I believe longer
packets may require more processing time.

Thanks for your reply.