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When a WiFi client is not connect to a wireless network and looking for WiFi networks to connect to, the client broadcasts a list of known networks. I know that this is so that it can connect to networks that have SSID broadcast disabled, but are there any other reasons the client sends the known network names? If that's the only reason, is it possible to prevent the client from broadcasting known SSIDs? It seems like a massive privacy violation, and I don't use any hidden networks (and most people I know don't use them either), so this feature seems pretty useless (for the end user).
Yes, you can. No, it's not useless, there are broader perspectives on the use of networks and the value of SSIDs within that. But this site is about electronics design... – TonyM – 2017-12-21T21:01:34.770
3"When wifi is disabled, and the client is looking for wifi networks, it broadcasts a list of known networks." Can you clarify this? By client do you mean AP or device connecting to AP? Whichever you mean, the rest of this sentence doesn't quite make sense to me, perhaps I'm missing something – wysiwyg – 2017-12-21T21:23:04.683
2Yea, I don't get this. Are you saying that computers and phones and other devices LOOKING for wireless networks to connect to will broadcast a list of the wireless networks they've found so that other clients can see those lists without scanning for the available networks themselves? Please use the Edit button and make your question more clear. – music2myear – 2017-12-21T21:32:36.090
Sorry, i made a typo, I'm referring to active scanning per dirkt – BeB00 – 2017-12-21T23:02:52.180
"client broadcasts a list of known networks" - where does the client get this list, and when & why does it broadcast them? A client (especially in a new area) won't have a list of local SSID's to broadcast. This question just raises further questions... – Xen2050 – 2017-12-22T21:13:53.520
1@Xen2050 That list would necessarily be populated by SSIDs of which the client has previous knowledge, namely networks to which the client has previously connected (and saved said connection details). – I say Reinstate Monica – 2017-12-22T21:20:56.107