MoCA stands for Multimedia over Coaxial Alliance, which means that you can use the coax cable wiring that exists in your home to get faster speeds and increase your Wi-Fi coverage. Some modern routers have the MoCA capability already built in. If you are unsure if yours does, you can ask your Internet service provider (ISP) if your router is MoCA-enabled. Or, you can invest in a router with MoCA on your own.
If the router you already own has MoCA built-in, you can use one MoCA adapter to setup an Ethernet over Coax network to get incredibly fast and reliable speeds.
To set up your MoCA adapter with a router that has MoCA technology is easy. All you have to do is connect your one MoCA adapter to a coax jack and to your device via Ethernet and make sure it pairs with your MoCA-enabled router. Since your router has the MoCA technology built-in, it stands in for the second MoCA adapter in the connection.
However, if your router doesn’t have MoCA built-in, all you need to do to setup your MoCA connection is connect one MoCA adapter to a coax jack and into your router and connect another adapter with an Ethernet cable into the device you use to connect to the Internet. (This requires an Ethernet cable.)
So, why do you want MoCA with your router? Because it makes your Wi-Fi better.
Having two MoCA adapters will guarantee that you can successfully set up a MoCA network in your home. With or without the enabled router.