A:AnswerThis is a router only. It acts as a gateway between your LAN and the internet. Your home devices need to connect to a switch and the switch to the Ethernet port on this router.
A:AnswerThis is a cable modem. Its input needs to be a coax cable that has the signal from some cable based internet provider. The output ethernet cable goes to your router that provides the wifi to your location.
A:AnswerIf you are installing for Comcast, just hook up with the coax cable, plug into your wireless router. Next step is to call Comcast and give them the MAC Address and model number. That is it.