I got fiber optic internet and found this on the side of my house. The box wasn't locked, so anybody could just come up and plugged something into an open port and
Fastest Cable Internet Speeds with DOCSIS 3.1 | NETGEAR
Modem vs. Router: What's the Difference? | Wirecutter
Amazon.com: NETGEAR 4G LTE Broadband Modem - Use LTE as Backup Internet Connection, Unlocked, Works with Any Mobile Network Provider (LB2120) : Electronics