You have a computer at home. the computer is connected to the internet through a dial-up connection. every time you connect to the internet, you send a request to the internet service provider (isp).
which device establishes this connection?
a) sound card
b) modem
c) microphone
d) speak

Modem

Explanation:

  The Modem is the type of device that mainly enable the computer for transmitting the data over the internet and cable. The MODEM is basically stand for the modulator and demodulator.

The modem device basically covert the digital signal into the analog signal that are generated by the computer. By using the dial up connect, we send the request to ISP (Internet service provider) every time when we connect the device to the internet.  

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step-by-step explanation:

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explanation: