2. The other end of the Ethernet cable plugs into an available LAN port on your personal router or modem/router combination device
provided by your Internet Service Provider.
3. If there are no available Ethernet ports on your router, attach a network switch to your router and plug the other end of the included
Ethernet cable into the network switch.
Registration and setup - Hubitat Documentation https://docs.hubitat.com/index.php?title=Registration_and_setup