["Fu Yuanqiang" <yuanqiang@xxxxxxxxxxx>]

Hi all,
I am fairly new to wlan world and would like to ask some questions, coz i 
wouldn't find the answers in the archive. Thks for the help in advance!

1.) May i know when the network card is in monitoring mode, it actually 
gather the radio header informations such as Avs, radiotap and prism header. 
what is the difference between them? Is it due to hardware difference, or 
driver difference that cause it to have different type of format for radio 
header.

2.) I think the above 3 radio format has mac timestamp information, but i 
have no idea whether the timestamp information is gather from the monitoring 
network card or is the timestamp recorded from the network card that is tx 
the packets.

3) Is the mac timestamp info taken from the OS kernel clock or the network 
card clock?

Thks for takin time to read the info! Sorry if i am asking in the wrong 
forum.

Dylan.