I am planning to purchase a Deco home wi fi system (3 units).  I have ethernet cable running to the 3 intended locations for the Deco units and will keep my ISP modem router in router mode (but turning off wifi).  I understand that I can set up ethernet backhaul by connecting one Deco unit to the modem router by ethernet and then in turn connecting the remaining 2 units to each other in a “daisy chain” system.   Is it also possible to connnect each of the Deco units direct to the modem router (in a “star” system?  If yes, what are the advantages and disadvantages of each system?