A:Answer depends. If you have two routers on a network; you will want the one of them to be in bridge mode. Otherwise you will have 2 DHCP servers fighting to assign address, and you will have nothing but issues. What I would do is if you have a combo router/modem, use that as the primary router and disable the wifi on it. Then attach this one in bridge mode. This is an AC standard router, so depending on how old your old modem/ router is, this one would well out perform from a signal / wifi / wifi data transfer perspective.