I would like to mention that I am not too good with networking hardware.
I recently got a dual-band AC router (Asus RT-AC66U) and have been hearing some conflicting advice on how the dual-band works.
First of all, if I take for example a Dual-Band N router with two 300Mbps bands. That means that you have two lanes that go up to 300Mbps, and they don't add up to 600Mbps right? I have heard it mentioned both ways, and I always assumed they don't add up the same way having two 1GHhz cpus would not add up to having a single 2Ghz CPU.
Also, I was told that each band would have it's own SSID, but when I set up my router I only saw one SSID. I assumed it was automatic and the router manages which device goes on which band until I was told that I should be seeing two SSIDs instead of one (other than setting up WiFi security and assigning specific IPs to specific devices by network name I left it more or less on default settings, I am certain that the dual band option was enabled though).
And finally, I was told that this is important because having a b or g device on a n band would slow the band down to b/g speeds. Is this true? Does that mean that when AC devices are common, and I connect an old b or g device to it, that it will slow the entire band down to below even n speeds? Or that all the n devices I have now will mean there was no point in getting an AC router unless I get rid of them all? (or stick them on their own band?).