1. Which of the following performs modulation and demodulation ?
(a) Coaxial cable
(b) Fiber optic
2. What is the name of the device that converts computer output into a form that can be transmitted over a telephone line ?
3. In MODEMS ________.
(a) analog signal is amplified.
(b) digital signal is amplified.
(c) several digital signals are multiplexed.
(d) a digital signal changes some characteristic of a carrier wave.
4. If communication software can be called the “traffic cop” of amicro communication system, then what should the modem be called ?
5. For connecting modem, a computer must be equipped with a port that conforms to the RS-232 standard of the Electronic Industries Association of America. What do the letters ‘RS’ stand for ?
(a) Recognized standard
(b) Random sequence
(c) Recommended standard
(d) Registered source
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