Here is what I would like. I want to connect a new D-Link N Router (I'll call it router B) to a older router (Call it router A). My setup. Our internet line comes in and goes to router A which is broadcasting unsecured. (I know it's not safe, but we run a campground and the owners want is free and unsecured.) I then want to run a LAN cable from Router A to Router B. Router B will be broadcasting secured. My question is, even though Router B is secured, would it become vulnerable or unsecured because it is running through a unsecured router (Router A)? Thanks for the help!