1. No. 2. Yes. 3. I believe that Auto MDI-X is supported - you can test that yourself. 4. Yes, in AP mode. You can name SSISs the same or different - roaming between APs will depend on your client...

greetings, I would like to ask about few technical issues of ARCHER router AXE75 (as my local Czech tplink support failed to answer) are channels 12, 13 and 14(only in Japan) available to be set up...