hi arditsferdelli,
for your first question you can check this link [Hidden Content]
However, i am currently studying the material of JNCIA and haven't seen traffic sampling been introduced anywhere !!.
regarding your 2nd question, based on the above configuration sample. The traffic from 10.10.10.25 destined to 200.200.200.1 will be policed, since it doesnt fall into any of the previous terms and the last term doesn't have any match statement.
thanks,
Ahmed.