Though I am still a beginner with pi, I assume this is the correct place to post my question as I believe it is a bit more complex than "beginner" level.
I am running new pi3 with latest Raspian Jesse OS and want to have a second wifi adaptor installed and connected to different AP than wlan0. I have several questions related to setup and use.
1. Should the pi be powered up and THEN the wifi plugged in, and once the adaptor shows up as wlan1 in the list on desktop then enter the credentials?
2. If I have entered credentials for wlan0 for access point "A" and then credentials for wlan1 on access point "B", will the pi always leave these settings and wlan0 always connects to "A" while wlan1 always connects to "B"?
3. AP "A" has internet connection while "B" is hosted on this pi. Also, the pi is running node-red. Will node red be able to automatically be able to access the internet from wlan0? ie. does pi use any available netwrok connection to attempt to reach the destination regardless of whether access is obtained by eth0, wlan0 or wlan1, Or do I need to do something to make the system aware of being able to reach the internet via wlan0?
4. Is it ok to let each wifi use dhcp or should I select manual or static ? The router will assign address in range "192.168.1.xxx" while the pi AP will assign in range "192.1.42.xxx".
Finally, is setting up credentials in the desktop sufficient or do I need to manually create entries in interfaces and supplicant files?