mabvmet

Hi everyone. Well, I have some doubts. If in my home network all my devices support Gigabit-Ethetnet, (cables also) but if one device, let's say, a wireless router (used as Access Point) is Fast-Ethernet... My network is something like this... ISP modem > switch > Port1 > TV1 Port2 > PS4 Port3 > Apple AirPort Extreme > PC and Mac Port4 > wireless router (AP) <- This device is FastEthernet > XBOXONE > TV2 1.- Will My entire network work in GbE or just all the devices after the wireless router? 2.- If I keep growing my network through more switches the speed of my ISP will be divided between all the devices? Thanks a lot in advance. P.D. Any suggestion about my network is welcome.