Ethereal-users: Re: [Ethereal-users] whats is the difference between AVS, RadioTap, prism header

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From: Guy Harris <gharris@xxxxxxxxx>
Date: Tue, 28 Mar 2006 10:18:07 -0800
Fu Yuanqiang wrote:
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. 

It depends on the OS and the driver.
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.
Driver differences. On the BSDs, the drivers generally support radiotap if they support radio headers at all. On Linux, some drivers support the Prism header and some drivers support the AVS header; I don't know whether any drivers on Linux use radiotap.