Hello, I plan to set up ATT fiber at my house (BGW320). I purchased the 3 Pack X55 to have ethernet ports available in my room. I am not network savvy, so I have been researching whether the X55 should be set as a router or an AP. I have a couple of questions.

1. If x55 is set up as a router, the att gateway will need to be turned off via the interface correct?
2. Will different SSIDs show up if x55 is in AP mode?
3. What are the restrictions or downsides of ATT gateway being on router mode?

Any other beginner knowledge would be so helpful! TIA!