I've noticed that all-in-one dsl modem/router/switch devices can usually support 10/100 mbps as opposed to 10/100/1000 mbps. Why is this? Is it because dsl connections aren't that quick? Secondly, would a modem that only supported 10 mbps affect the communication between a node and a device (i.e. network printer), even if the router supported 100 or 1000 mbps, or would the modem only affect the internet connection?