How to Connect a Router to a Modem (with Pictures) - wikiHow
ARRIS SURFboard DOCSIS 3.1 Cable Modem & Dual-Band Wi-Fi Router for Xfinity and Cox service tiers Black SBG8300 - Best Buy
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NETGEAR Orbi Mesh WiFi System with Built in Cable Modem AC3000, DOCSIS 3.0 | Up to 5,000 Square Feet; Certified for XFINITY from Comcast, Spectrum, Cox, and more (CBK40-100NAS) - Walmart.com