Xfinity will let you rent a modem when you sign up for its Internet service, but you do have the option of using a third-party modem instead. Here's how.

The box you rent from Comcast contains both a modem, the device that connects to the service provider's network, and the wireless router, to which you connect via WiFi or Ethernet cable.

I live in a 750-square-foot apartment, and my internet needs are mostly limited to video calls and TV streaming. If you live in a larger home with multiple floors, the same router likely won't cut it.

These two devices help power your home internet connection. It helps to know how they function. Here are the details.

Routers like Boschulte's broadcast a network called xfinitywifi. Comcast subscribers who connect to the network and sign in using their Comcast credentials gain access to the Internet.

Netgear combines cable modem, Wi-Fi and voice service in a new gateway for Comcast You now can get your own internet equipment even if you use telephone service from Comcast.