The answer is : Modem
. It is a device that provides access to the Internet and it may also be internal. Modem is short for "Modulator / Demodulator." It is a hardware component that allows a computer or other device such as a router or switch, to connect to the Internet. It converts an analog signal from a cable wire to a digital signal that a computer can recognize.
b serves as food for the yeast
Switch/Router is Broadcast
