| -----Original Message----- | From: Guy Harris | | I'm not a radio expert, but I think that an 802.11 device can only | receive on one channel - the manual for Sniffer Wireless | indicates that | it implements a "channel surfing" mode, but in that mode it appears to | listen on a given channel for some number of seconds, and | then switch to | the next enabled channel and listen on that for some number | of seconds, | and so on - if you've configured it to look for a particular BSSID, | it'll stop if it detects that BSSID on a given channel and will, I | infer, capture traffic on that channel. You can also specify "trigger | events" (particular types of packets to look for) and, if it gets a | trigger event in channel surfing mode, it'll capture on the channel on | which it saw that packet. That seems to imply that you can | only capture traffic on one channel at a time. | | (I don't know whether that's an intrinsic limitation of | 802.11; it might | be possible to have an 802.11 card that taps multiple | channels, although | that card might require multiple DSPs to handle multiple channels. I | suspect no cards do so.)
I suspect the "boosted" 802.11 equipment providing multiples of 11Mbps from using more than one channel at a time. Regards, Olivier _______________________________________________ Ethereal-users mailing list [EMAIL PROTECTED] http://www.ethereal.com/mailman/listinfo/ethereal-users
