5. The cheapest modems can transmit a. 100 bits per second b. 300 bits per second c. 600 bits per second d. 900 bits per second
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| 145. | The cheapest modems can transmit |
| a. | 100 bits per second |
| b. | 300 bits per second |
| c. | 600 bits per second |
| d. | 900 bits per second |
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- 204. Modem is used in data transmission. When was it invented and in which country? a. 1950, USA b. 1963, USA c. 1950, Japan d. 1965, Germany265. How many communication channels are needed for serial transmission? a. 1 channel b. n channels c. n+1 channels d. None of the above152. 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. Registered source b. Random sequence c. Recognised standard d. Recommended standard
- 95. In ................... transmission, the channel capacity is shared by both communicating devices at all times. a. simplex b. half-duplex c. full-duplex d. automatic244. The minimum time required to download one million bytes of information for V32 modem would be a. 800 s b. 834 s c. 900 s d. 1000 s168. A modem is connected in between a telephone line and a a. network b. computer c. serial port d. communication adapter
- 246. The High-bit-rate Digital Subscriber Line (HDSL) was designed as an alternative to a. ADSL b. T-1line c. DSL d. DMT9.Fiber Optic Cable uses a. Electronic pulses to transmit Information down copper lines b. light pulses to transmit Information down fiber lines c. Does not send any pulses d. Requires a connector to send any pulsesWhat type of serial communication is shown below?
- 41. In _______ transmission, the channel capacity is shared by both communicating devices at all times. a. simplex b. half-duplex c. full-duplex d. half-simplex130. In the third generation of cellular phones, _______ uses TDMA. a. IMT-DS b. IMT-MC c. IMT-TC d. IMT-SC128. In the third generation of cellular phones, _______ uses W-CDMA. a. IMT-DS b. IMT-MC c. IMT-TC d. IMT-SC