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I've read many subjects about WiFi interference but I'm still not 100% satisfied about the problem I encountered.
Well, I have my own Internet connection and my own WiFi 2.4Ghz router on channel 11 (approx. -45db). when I test my connection with SpeedTest or another speed test website, I get the full speed provided by my ISP.
I also reach my neighbour's WiFi 2.4Ghz connection which is also set on channel 11 (approx. -55db). I have access to this connection (my neighbour is my cousin). Again, when I test this connection, I get a very good result.
(There are also about 10 more WiFi networks set on different channels within range in my room)
BUT, I don't know why, last night I had the strange idea to test both connections at the same time with 2 laptops. And the results I got were not good. I almost lost 50% bandwidth on both connections !
So, I'm wondering, is it "normal" ? Is it what we call "co-channel interference" ?
Thank you for your help =)
1Yes; What you describe would indeed by interference. Switch the channels on one network and it should be better. The real solution would be to switch to 5.0 GHz on one device. – Ramhound – 2015-07-27T15:08:51.500