What device is necessary for establishing a connection between a home network and the Internet?
Switch
Router
Modem
Hub
A modem connects a local network to the Internet by converting digital data into signals appropriate for the service medium (telephone, coaxial cable, or fiber) and by demodulating the incoming signals back into digital data. Routers direct traffic between different networks but rely on a modem (or an integrated modem) for wide-area access. Switches connect devices within a network and forward frames based on MAC addresses, while hubs are simple multi-port repeaters that broadcast incoming frames to every port. Only the modem performs the signal conversion required to communicate with the Internet service provider.
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