TOS field

[Anurag <anurag@cs.ust.hk>]

Hi All

I am new to ns. Please forgive me for simple questions. 

Is TOS (type of service) field defined in IP packet header by default.

Where is it defined and how can it be used, i.e. is there any support for
it in routers (classifiers or schedulers).  

Is there any code or documentation for 'ns' available for it or related
topic.

thanks in advance,

Anurag,
Computer Science Department, HKUST, HK
Office Room N0. 4204, Phone: 2358 8832 (Lab.)
Email: anurag@cs.ust.hk