A:AnswerThis modem is rated for speeds up to 686 Mbps as it is a 16 x 4 DOCSIS 3.0 modem. My experience is that with a handful of devices connected wirelessly to the router and my laptop wired to the router I get 529.8 Mbps download with my Xfinity 600 Mbps service (and 23.8 Mbps upload). So I am pleased. I suspect that if I disconnect all of the other devices and retest, I would likely see speeds close to 600 Mbps.
A:AnswerYou have to have a internet provider. This one is expensive, don't believe that, I needed this particular one. I didn't do my homework and rushed. Do yours, get the one that fits your home and what your using it for.
A:AnswerIt can but you need one for 600mbps otherwise you're limiting your overall internet experience.
Was informed of that from a spectrum technician when I decided to buy this.