How does a cable modem receive and send data?

A cable modem operates primarily by utilizing coaxial cables to receive and transmit data, which is a fundamental component of its design. The coaxial cable is capable of carrying a broad range of frequencies, allowing for high-speed data transmission alongside traditional cable television signals.

In the send-and-receive process, the cable modem modulates data onto these coaxial cables in a form suitable for transmission over the cable system. For incoming data, the modem demodulates the signals it receives via these cables to interpret the data meant for the user. Alongside coaxial connections, Ethernet is employed to connect the cable modem to devices within the user’s home, such as computers and routers. This interface allows for the local distribution of the internet connection sourced from the cable network.

Other options presented do not accurately fit the function of a cable modem. For instance, fiber optic cables, although capable of high-speed data transmission, do not apply to typical cable modem setups. Similarly, telephone lines are used for DSL connections, not cable modems, and satellite connections, while valid for certain internet services, involve different technology and hardware compared to that used by cable modems. Thus, the combination of coaxial cables for data transfer and Ethernet for local connectivity is what makes that