Mix fast ethernet and gigabit
I have att fiber (1 gig) internet service. I was wondering if I can add one fast ethernet (100base t) cat 5 to the network. The reason being is that the installer used the brown and white with brown twisted pair from a cat 5 cable that ran to one room for power to psu/battery backup for the outside unit. I then had the battery backup box moved to another room still retaining the cat 5 in the original room. I would still like to utilize the Cat 5 between the rooms minus the brown twisted pair, hence fast ethernet only. Would it slow down all my other gigabit cat 6 runs? Would I connect directly to modem or to switch after modem?