What is an ONT (Optical Network Terminal) in a fiber-to-the-home (FTTH) deployment, and how does it differ from a traditional cable modem?

• A.An ONT and a cable modem perform identical functions and can be used interchangeably on any ISP's network
• B.An ONT is an older technology used for DSL connections over copper phone lines; a cable modem is the modern replacement used for fiber connections
• C.An ONT is the customer-premises device that converts optical fiber signals (light pulses) to Ethernet signals for the home network - it is the fiber equivalent of a cable modem; a cable modem converts DOCSIS RF signals over coaxial cable to Ethernet, whereas an ONT converts passive optical network (PON/GPON) light signals
• D.An ONT is a device installed at the ISP's central office; the cable modem is installed at the customer premises for the last-mile connection