You only need to connect one ECB5240M Network Adapter to the coaxial network in order to provide high-speed Ethernet connectivity. The device (i.e. router) feeding the broadband service to the coaxial network will dictate what MoCA protocol is used by your home coaxial network. The ECB5240M Network Adapter is capable of supporting Bonded MoCA 2.0, yet it is also backward compatible to support earlier MoCA protocols (non-bonded MoCA 2.0, 1.1, and 1.0). This means that the ECB5240M Network Adapter will adapt to any of these MoCA protocols supported by your home network and still take advantage of your coaxial network without necessarily having to upgrade existing devices.