Sounds like you are more worried about getting a router that won't be a choke point for your 200 Mbps connection, right? If you are worried about getting a router that won't let you get the full bandwidth of your 200 Mbps connection, all you need to do is make sure you buy a router with a GigE connection. You will see that they say something along the lines of (10/100/1000). You want to get one that has 1000, that is the number of megabits per second the router can process. Make sure the WAN port is rated for GigE (1000) as well (that is the one you are going to plug into your Cable / DSL modem. You would use the information some of the other answers have provided to figure out if your 200 Mbps internet connection is fast enough to support the number of devices you plan to use simultaneously. Just remember if you are trying to get maximum performance from your laptop, SmartTV, etc., you want to hard wire them into your router, wireless is ALWAYS slower than wired speed (at least today).