Question: New modem with AirPort Express
I have an old Motorola SB5101u Surfboard Cable Modem, and want to update it (Cox Cable). I have an old AirPort Express. Would a new DOCSIS 3.0 or higher ("Cox certified modem required") work with my old AirPort? Any suggestions on makes/models of modem to get? Thanks.
MacBook Pro, macOS High Sierra (10.13.3), WD My Passport Ultra 2TB as backups