Hi I'm basically new to pi's so i need some info on this carrier board like 1 why four RJ-45 ports? how can i use all 4 at same time, do the get their own IP address 2 dimensions of the board with location of holes an dwg would be fine. 3 can any power supply be used or do i need a special one ? 4 where can i get a manual for this board? 😀