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As of 10/18/2018, Spectrum has not listed the Netgear AC3200 X4S C7800 modem/router on any of its lists of recommended modems. And considering it lists its top tier service at 400 Mbps, the C7800 is overkill and Spectrum may well deny registering the modem on its network. Call Spectrum to be on the safe side! As for the world of difference between DOCSIS 3.0 and 3.1, I refer you to a Cisco blog page that may tell you more than you bargained for at https://blogs.cisco.com/sp/the-benefits-of-docsis-3-1. This chart, from its blog page, gives some of the basic differences:
Sorry, there was a problem. Please try again later.Steve Docsis 3.1 will handle speeds up to 1GB
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