On Oct 6, 2014, at 11:20 PM, Jay Hennigan <jay@west.net> wrote:
On 10/6/14, 8:41 AM, Owen DeLong wrote:
Actually, in multiple situations, the FCC has stated that you are responsible when deploying a new unlicensed transmitter to insure that it is deployed in such a way that it will not cause harmful interference to existing operations.
Using the same SSID of someone else who is already present would, IMHO, meet the test of “causing harmful interference”.
Really? From a radio perspective if it isn't on the same RF channel?
In fact, yes. Since clients bind based on SSID and return to whatever channel the AP tells them to as a result, it's still an issue and still fits within the purview of RF regulation. Further, most of the channels somewhat overlap as it's a spread-spectrum technology, so the traditional concepts of "channel" don't actually completely apply (this is a good thing, actually).
I'm not so sure about that. It might cause interference to the revenue stream, it could be considered a trademark infringement especially if it leads to a fake "splash page" with the Marriott logo, and it could certainly be used for malicious MITM purposes, but it doesn't cause harmful interference to the existing user from the perspective of radio frequency use.
It does, actually, because the client may well rebind to the other AP thinking it's still part of the same ESS (since ESS are usually identified by sharing a common SSID). Owen