You do NOT have to use a Cox modem. Just one that is "Docsis 3.0" compliant. An upfront cost, but will pay for itself.
You can. But you have to go thru a Cox web portal to make changes and set it up. Also, Cox will try and tell you that you need extenders because the Panorama system they offer is absolute crap. Buy your own Docsis 3.0 modem
yes
yes. in fact you have to use a cox modem, and it has a router built in if you use wireless
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