My cable modem and router are upstairs. I've added a 8-port switch upstairs to accomadate a couple of new devices my 4-port router no longer has room for. I now want to run a 100 ft cable downstairs from the upstairs 8-port switch to hookup 3 network devices I have in my living room downstairs. Once that live 100ft cable coming from my 8-port switch upstairs gets downstairs, can I then add another switch at that point to give connectivity to the 3 downstairs devices?